Bling!

12:33 PM PT -- Katherine is showing off her engagement ring after grabbing breakfast Monday with her younger sister, Christina ... check out that rock on her ring finger!

8:32 AM PT -- It appears Anna Faris is excited for the new couple too, commenting, "I'm so happy for you both!! Congratulations!"

Chris Pratt and Katherine Schwarzenegger are engaged!!!

Chris posted this Monday AM ... "Sweet Katherine, so happy you said yes! I'm thrilled to be marrying you. Proud to live boldly in faith with you. Here we go!"

All the signs have been there for a few months ... he's been hanging with her entire fam, including Arnold Schwarzenegger and Maria Shriver. Chris, Katherine, Maria and Patrick Schwarzenegger were all just in Mexico together.

It was a super fast romance ... they met only last June, apparently through Maria. They were almost immediately inseparable, spending lots of time with Chris' 6-year-old son, Jack.

Chris and Anna Faris settled their divorce late last year. They separated in August 2017 after 8 years of marriage.

No word on when they're tying the knot.

So, Chris is going to become part of the Kennedy klan. Maria's mom, Eunice Kennedy Shriver, was the sister of President John F. Kennedy, Robert Kennedy and Ted Kennedy.

Congrats!!!

Originally Published -- 3:24 AM PST

Floyd Mayweather has one helluva watch collection -- 41 time pieces in total -- including a crown jewel, the $18 million "One and Only."

Seems Floyd was just bored on Wednesday and felt like stuntin' on all of us normies -- so he broke out the briefcases with his super expensive man jewelry ... and showed it all off.

"When I go on pay-cation for 30 days," Floyd said ... "I take 30 watches with me."

"But, you know what, if we add 10 more days, I take 10 more watches," he explained while opening a 2nd case.

And, then the big daddy ...

"But then, I say 'f*ck it. If I wanna bring out the one and only, then I'll take out the watch that costs $18 million."

The watch is technically called "The Billionaire Watch" -- made by Jacob & Co. back in 2015, it features 239 emerald-cut baguette diamond stones, each weighing up to 3 carats.

Floyd says he bought the watch last summer from a Japanese jeweler named Tadashi Fukushima -- and claimed he'd never buy any jewelry from anyone else ever again.

But, if he sees the right watch somewhere else ...

Floyd has made a ton of money during his pro boxing career -- $300 mil to fight Pacquiao, $300 mil to fight McGregor ... and $9 mil to fight Tenshin Nasukawa.

Anthony Anderson really coulda used a Swiss Army Knife after dropping a diamond in a shower drain, but since he dubbed himself "Ghetto MacGyver" ... Q-tips, dental floss and a broken comb were all he needed for the mission.

The "Black-ish" star is in Rome, where he perfectly executed "Operation Save Diamond Earring" at the Waldorf Astoria Resort. After his diamond earring went down the drain, he recorded the whole rescue effort.

You gotta watch the video ... Anthony was kinda pissed there were no wire hangers in the room to use during the operation -- but he made due with everything else he could find in the bathroom.

Anthony said he wanted the whole mission on video just in case it failed -- for insurance purposes -- but more than anything it's just entertaining to watch him try to keep a steady hand. Anyone remember playing Operation?

Anthony captioned the video, "I'm naked, wet and soapy! I did the best I could with two Q tips, a comb and dental floss to save my diamond." He included #justakidfromcompton #ghettomcgyver #diamondsareforever #adventuresinrome #rome.

Quavo knows the way to a woman's heart, because he's lavishing his rapper girlfriend with some custom diamond jewelry ... and the super sweet gesture cost him a fat check!

We're told the Migos rapper ordered some cute snowflake bling as a Christmas gift for Saweetie ... and he hit up Icebox in Atlanta for the diamond pendant and chain, which we're told carries a price tag of around $75,000!!!

Our sources say the snowflake jewelry is loaded with baguette diamonds, just like Quavo's new $250k diamond grillz. We're told Quavo rolled into Icebox right before Christmas to personally scoop up the bling.

Derrick Henry got his O-linemen the ultimate "thank you for blocking for me" present this week ... CUSTOM DIAMOND CHAINS, BABY!!!

The former Heisman Trophy winner ran all over the Jaguars a couple weeks ago ... trouncing Jacksonville for 238 rushing yards AND four touchdowns.

In fact ... dude had 99-yard run in the game that sent the NFL world into a frenzy!!!!

Henry's yards were the most-ever in Titans history ... and his 4 scores tied the franchise mark -- so, as a thank you to his O-line for blocking for him ... he got them some sick drip this week.

We're told Henry got the chains -- which feature a gold 238 -- for all five of the O-linemen who started for the team during the Week 14 romp.

Demi Lovato looked almost angelic while ringing in the New Year, clearly sticking to her new battle cry -- to never take another day for granted.

The singer and her BF, Henry Levy, celebrated the New Year in Aspen. She was all smiles and dressed to the nines -- flowy, long white fur coat (we know, can't tell if it's real or faux) with boots and a very color-poppin' Hermes Birkin bag.

Demi's jewelry choices might also raise eyebrows -- she's rocking a diamond ring on her left ring finger -- y'know, that one. It doesn't look very engagement-y, and the relationship is only a couple months old -- but stranger things have happened.

Justin Bieber wanted the members of his Drew crew to have a nice day ... so he hooked them up with some serious smiley face bling.

The Biebs' company, The House of Drew, is launching a line of clothing and merch early in 2019, and to celebrate the occasion ... he ordered up 6 custom necklaces with pendants of the happy Drew logo.

We're told the 2 larger smiley faces are for JB himself (maybe one for Hailey?), and the other 4 were gifted to his team. Our sources say Justin ordered the ice from celeb jeweler Eliantte just in time for the holidays.

All in all, we're told the Drew jewelry's worth about $250k.

We broke the story in February ... Justin filed trademark paperwork to expand his brand, which features his middle name.

He already released a line of comfy hotel slippers for Christmas and they were a hit ... selling out almost instantly. Mrs. Bieber got a pair though.

The rest of Bieber's Drew brand is set to be released pretty soon ... so keep your eyes on the smiles.

Antonio Brown is gunning for G.O.A.T. status -- and he's starting with a sick new diamond ring!

Check out AB's new jewelry ... 6.5 carats, 1,000 diamonds and some serious meaning behind it.

Here's what we know ... the Steelers WR hit up Gabriel the Jeweler -- who works with superstars like Odell Beckham and Jarvis Landry -- and said he wanted a custom piece to symbolize his quest to become the greatest receiver to ever play.

Gabriel tells TMZ Sports ... he spent countless hours blingin' out the ring with 1,000 micro-pave set VVS diamonds -- explaining, "it's a very precise job."

If you've seen A.B. before ... you've seen Gabriel's work. He's the guy behind Brown's $200,000 gold and diamond birthday pendant, which features the names of Brown's children.

Gabriel was tight-lipped on how much Brown dropped for the G.O.A.T. ring ... but we're told it's valued at $20k!

Isaiah Crowell ain't about to forget his first season with the Jets anytime soon ... 'cause the RB got a custom diamond pendant made to remember it forever!!!

TMZ Sports has learned the Jets star hit up Luxe Jewelers in Atlanta to make him some sick ice that commemorated his first year in NY ... and seems they delivered.

The drip -- which features Isaiah's No. 20 jersey and "Crow" nickname -- cost roughly $50,000 and has 12ct diamonds AND 150 grams of solid gold.

We're told the piece -- made by Ali G and Ali L -- has diamonds that are all VS clarity ... with a pendant that has 2 tones and is 3D.

Crowell had been having a solid first year with New York -- logging 685 rushing yards and 6 touchdowns -- before a foot injury ended his season a couple weeks ago.

Stefon Diggs won Son of the Year AND Brother of the Year awards in just a couple hours on Christmas ... 'cause the WR got his mom a new car and his bros diamond chains!!!

The Vikings superstar started his Santa impression Tuesday with a Mercedes ... delivering it to his mom on the holiday in a fashion she'll never forget.

"You get 1 mom... here’s something for the lady that put up with all my craziness. Merry Christmas everyone," Diggs wrote.

But, his bag of toys didn't end there ... the dude also had diamond shovels (get it, Diggs??) made by Al the Jeweler for his brothers!!!

It's a huge Christmas haul for the Diggs fam ... but don't worry -- we got a feeling this is a trend that'll continue for years -- Stefon just signed a 5-year, $72-MILLION deal!!

Paris Hilton's not mincing words anymore -- she says the $2 million engagement ring she got from Chris Zylka is hers to keep ... and he didn't spend a dime on it, anyway.

We got Paris at LAX Wednesday and asked her to clarify recent comments she made, suggesting the jeweler who provided the ring got millions in free publicity ... so it's going to stay with her.

Now she's going a step further, emphatically telling us ... "It's mine." She also says it was free in the first place ... implying Chris didn't actually buy it so he has no claim to it.

As we've told you ... after Zylka proposed to Paris, the story was he bought the ring -- which features a massive 20-carat diamond that took about 4 months to cut.

But, Paris now says that was never the case, and according to her ... she's paid for the ring via social media promotion and whatnot.

Not sure that will hold up in the court of law, but until we hear more from Zylka or the jeweler ... we know where to find the ring.

Travis Scott is really feeling his Astroworld tour ... because the "SICKO MODE" rapper is immortalizing his set design with an insane new piece of bling!

We're told Travis dropped around $450,000 on this incredibly detailed chain and pendant. It's pretty much the bling equivalent of his concert layout, complete with his mug in the middle of a Ferris wheel and the tracks of his roller coaster stage design.

These ain't space rocks. Our sources say the pendant and chain feature 150 carats of VS diamonds and over 1,000 grams of gold!

Travis commissioned Eliantte to design and create the sick bling, and the celeb jeweler personally delivered it before Travis' show at The Forum. That's the kind of customer service $450k gets ya!

As you can see ... the diamond and gold chain forms the tracks of the roller coaster Travis rides at his shows. The piece even has a diamond rocket ship, and it opens!

Safe to say Travis is gonna be the biggest baller at the Super Bowl!

Adrien Broner is rocking over a million dollars worth of bling, but he's never paid for his ice because he bounced checks to the jeweler and still owes the bill ... this according to a new lawsuit.

Pristine Jewelers NY says the boxing star promised to pay for multiple jewelry orders totaling $1.252 MILLION, but his checks haven't cleared and he's refusing to follow through on a payment plan.

According to legal docs, obtained by TMZ Sports, Adrien told the jeweler he would pay for his bling after his April fight against Jessie Vargas, but the jeweler has only been able to collect $100k from Broner ... leaving an unpaid balance of $1.152 million.

It's been over a year since Broner first ordered his bling, and Pristine wants the boxer to pay up now and throw in another MILLION in punitive damages.

Broner has a big payday in his future, because he's fighting Manny Pacquiao January 19 in Vegas. Problem is ... the jeweler claims Adrien has already stiffed them after one big fight.

NBA YoungBoy's concert exploded into violence Friday night, after someone ran up on him and tried stealing his chain.

The rapper was performing in South Carolina, sitting on his bodyguard's shoulder in the crowd, when a fan snuck up on him and tried yanking the bling off his neck. You see NBA YoungBoy jump off his bodyguard's shoulder and punch the dude in the face.

The bodyguard breaks up the fight, but it doesn't take long for the crowd to go at each other.

NBA YoungBoy got back on stage and started rapping with Quando. Problem is ... the guy who tried stealing the chain started heckling him, and Quando stopped the music and throws down a challenge ... if anyone had an issue with NBA YoungBoy, they should speak up or forever hold their peace.

Elon Musk's a visionary with HUGE balls ... and that's why a celeb jeweler's giving the billionaire this INSANE diamond Tesla ring.

We're told celeb jeweler Ben Baller designed and made this one-of-a-kind ring worth nearly $40k. It's truly unique ... it's 1 of 1 and custom made for the famous entrepreneur. The ring's a marvel -- it's solid platinum with custom cut diamond baguettes to spell out T-E-S-L-A.

Ben says the Tesla and SpaceX honcho is an inspiration when it comes to pushing the limits. "We salute you for giving almost 50,000 jobs to Americans and putting USA back on the map as a serious contender in the auto industry." He adds, "The last successful US car company startup before Tesla was Chrysler and that was 90 years ago."

As for Elon's new bling -- it features a rare, trillion-cut diamond to emphasize the "T" logo, which is surrounded by round, brilliant white diamonds. Ben says the ring was made in America, just like Elon's wares.

If it sounds like Ben's a superfan ... he is. He drives a Model X P100D.

He's impressed Musk kept pushing forward -- even after his PayPal success -- and "bet it all on Tesla and that takes BIG balls."

Paris Hilton's got some bad news for her ex ... the MASSIVE engagement ring Chris Zylka got her is staying with her, so she says, but the law is not on her side.

Paris appeared on SiriusXM's "The Jenny McCarthy Show" and dropped some tea on the $2 MILLION bling ring. She says, for reason, the jeweler received millions of dollars in free publicity ... and then went on to declare the ring stays with her.

Here's the problem ... whether the jeweler received free publicity or not is totally irrelevant. Chris is the one who bought the ring, at least that's the party line. Under CA law, if Paris called off the engagement -- which she did -- Chris has a right to get it back. It's called a gift in contemplation of marriage.

There is a wild card ... if the party line is not true -- in other words, if Chris didn't buy the ring and the jeweler fronted it to Paris -- then he has no right to the ring. But, that's not the way this whole thing was spun. There is one other scenario ... maybe Chris is willing to eat the money and he's never demanded the ring back.

BTW ... the ring's a doozy ... it's a massive 20-carat diamond, which took about 4 months to cut.