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Leonardo DiCaprio's yacht day in Sardinia didn't go according to plan ... as the actor had an unfortunate run-in with some sea life.

The Oscar winner was enjoying a dip in the Mediterranean Sea with his girlfriend, Vittoria Ceretti, as they jetted around the crystal blue water in goggles. Yet, the fun times didn't last long, as Leo soon emerged from the water ... and called out for help regarding a mark just below his tush.

Clearly suffering from a jellyfish sting or a bite of some sort, Leo hopped beneath the yacht's outdoor shower ... where his model girlfriend took a closer look at the wound.

Will Smith might want to start gearing up for the apocalypse ... 'cause he seemed to have the streets all to himself in the early morning -- and, it got him thinking about "I Am Legend."

The actor shared a video to Instagram ... telling fans he's walking through Zurich, Switzerland, in the early hours and flashing back to the hit 2007 flick -- 'cause he says he's not seeing another soul.

Smith explains he's only in Zurich because his plane couldn't take off ... unclear why exactly he's in Europe -- but, he says he needed to spend the night.

Zac Efron says he's feeling fine after an overnight stay in the hospital ... posting a workout pic to show fans he's already back up and lifting.

The actor shared the snap to his Instagram story just minutes ago ... chest-pressing some pretty major dumbbells while lying atop a yoga ball -- implying he's not taking any days off from the grind.

Efron writes he's "happy and healthy" and thanks everyone for their well-wishes. He even adds the date -- doing everything to let fans know they took the photo earlier Sunday.

Josh Hartnett took some inspiration from his real life for his recent serial killer role ... saying he based his psychopath on others he's met -- in the film industry!

The actor sat down for an interview with Entertainment Weekly Friday ... and he talks about diving into the mind of a serial killer like he did for his new movie "Trap" directed by M. Night Shyamalan.

Hartnett explains there are a lot of people on top -- CEOs, politicians and even people in entertainment -- who will say or do anything to get what they want ... regardless of the people they hurt to do it.

Robert Downey Jr. returning to the Marvel Cinematic Universe as Dr. Doom has some fans already bitching ... but one fellow actor who's worn the villain's iron mask is all in.

Here's the deal ... RDJ made a jaw-dropping appearance at Comic-Con where his MCU return after years as Tony Stark, AKA Iron Man, was announced ... which of course led to some clutching their nerd pearls -- as if it would sully his Marvel legacy.

Joseph Culp, who played Dr. Doom in the infamous 1994 “The Fantastic 4” film-- which never got an official release over an epic rights fight and has been bootlegged all to hell -- tells TMZ the trash talk needs to stop ... 'cause RDJ was and is the Marvel man!

Demi Moore's breaking wind with her new take -- she’s calling for farting to be normalized and wondering why it’s such a gas-tly issue.

The actress let it out while collab-ing with digestive health company Wonderbelly for a hilarious IG clip ... reading up on the history of flatulence from the company's new book "An Adult's Guide to Farts" to help her daughters Rumer, Scout, and Tallulah embrace the wind.

From blaming the dog to changing your identity ... Demi spilled the gas-causing beans on all the ways we commonly deal with farting.

Ryan Reynolds is weighing in on Jamie Lee Curtis' Marvel criticism and subsequent apology ... and the actor's response to the sitch would make Deadpool proud.

Here's the deal ... after JLC issued a heartfelt apology for recently claiming Marvel was in its "bad" phase, the "Deadpool & Wolverine" star chimed in -- and reminded everyone Jamie Lee's original quip really wasn't all that serious ... nor did it warrant an I'm-sorry.

Ryan took to X on Thursday amid Jamie Lee's announcement that she'd stop with the "mud slinging" -- with RR making it clear the apology wasn't necessary in the first place.

Britney Spears' life is ready for the big screen -- her bestselling memoir is on track to be turned into a biopic ... and we now know who's got the final say on who plays Brit.

Universal Pictures made the announcement Thursday -- saying they've secured the rights to the singer's book, "The Woman In Me," with filmmaker Jon M. Chu set to direct and Marc Platt set to produce/develop.

Sources familiar with the project tell us there've been no conversations yet about who would be cast to play Britney ... there isn't a casting director attached to the movie at this point, but we're told Britney will have casting approval. So, what she says goes on the lead star.

Sharon Stone just served up an update on the black eye she got during her Turkish getaway ... easing fans’ worries about her gruesome injury.

In an IG clip outside her Turkey villa, the actress dished her current European tour left her so dazed she didn’t know where she was. The result? She ended up giving her face a smack against the marble while stumbling to the bathroom in the middle of the night to pee.

Sharon didn’t spell out exactly how her face met the marble floor ... but it was clear she took a nosedive while navigating her late-night bathroom trip.

Matt Damon made it a full family affair at Wednesday night's NYC premiere of his latest film "The Instigators."

The Academy Award-winning actor brought along his beautiful wife Luciana Barroso and their daughters -- Isabella, 18, Gia, 15, and Stella, 13 -- to enjoy his new action flick at Lincoln Center in Manhattan.

Luciana's 24-year-old daughter Alexia with her ex-husband, Arbello Barroso, was also in attendance along with Matt's mom, Nancy Carlsson-Paige.

Sharon Stone is one tough cookie ... because she powered through a black eye on a European getaway.

The "Basic Instinct" star just shared a photo showing what appears to be a massive shiner covering one of her eyes ... which she apparently suffered on vacation in Turkey.

Sharon says ... "This trip has been tough; but I'm tougher."

Richard Simmons’ family is fuming over Pauly Shore trying to cast doubt on the authenticity of the late fitness guru's most recent posts ... and they're coming out swinging.

RS' team dropped a statement from his brother Lenny on X Wednesday -- clearing things up, writing ... "Dicky absolutely wrote his own posts. He worked on them a week in advance, going over and over them to get the right message."

Lenny added Richard would usually show his posts to him and his wife Cathy before they went live. So they’re saying it was definitely Richard behind those messages ... despite Pauly recently saying he wasn't so sure.

Jonathan Majors is expressing heartbreak after Marvel officially announced Robert Downey Jr. as the franchise's new villain ... pivoting away from his Kang the Conqueror character.

We caught up with the actor in West Hollywood Tuesday, where he explained why the RDJ Dr. Doom news was bittersweet for him. As he put it ... Dr. Doom's introduction into the MCU is pretty cool, but he loved playing Kang -- and so, it's only natural he's bummed about Marvel's redirection.

Though, some fans have felt Jonathan being blacklisted from the MCU has been too harsh of a punishment ... given he was found guilty of misdemeanor assault and harassment and given no jail time.

The 2024 Paris Olympics is serving up some serious star power -- major celebs are getting snap-happy at the hottest ticket in town ... and exhibit A is in this photo right here.

Margot Robbie teamed up with her "Barbie" pal Greta Gerwig for an epic star-studded meet-up bonanza ... which included Tom Cruise and directors Steven Spielberg and Christopher McQuarrie, all of whom came together for a photo-op out in Paris.

It’s a mega celeb line-up all in one shot -- like the iconic 2014 Oscars selfie, but with a more laid-back vibe.

Pauly Shore is still gung ho on making a Richard Simmons biopic happen ... even though the beloved fitness guru is now dead.

The actor-comedian was at LAX Monday when a photog asked him the latest on Pauly's pet project ... which he's been trying to film for a while now.

Pauly says the biopic is still moving forward despite Richard's recent death ... though there is a holdup in terms of financing.

Josh Hartnett's diving into scary moments in his past ... revealing he left Hollywood because he was being stalked -- including by a man he says once arrived at his location with a gun.

The actor spoke with The Guardian via Zoom from his estate in Hampshire, England ... a sprawling countryside where he lives with his wife partly because living in L.A. started to feel too dangerous.

JH says it's not the only reason he left L.A. about 20 years ago ... but, it didn't help that people started showing up at his house.