Memba Them

Australian actress Penelope Mitchell was in her early 20s when she first started playing Liv Parker -- the flirty and powerful witch twin -- on the hit drama series "Vampire Diaries" back in 2014.

Penelope was part of an all-star cast like Nina Dobrev as the caring gal who turns into a vampire, Elena Gilbert, Paul Wesley who's introduced as the loyal vampire, Stefan Salvatore and Ian Somerhalder as Stefan's selfish older bro and the charming vampire, Damon Salvatore.

Mitchell was also popular on the American horror TV series "Hemlock Grove" where she played Letha Godfrey.

American actor Peter Greene was in his late 20s when he played Dorian Tyrell -- one of the star mobsters and the scary villain of Edge City vying to rule the kingdom -- in the comedy/fantasy film "The Mask" back in 1994.

Greene shared the eerie set with Jim Carrey as the handsome, nerdy banker who turns into "The Mask," Stanley Ipkiss, Cameron Diaz as Dorian's girlfriend who actually falls for Stanley, Tina Carlyle and Peter Riegert as the nerdy Lt. of Edge City on the hunt to track down "The Mask," Mitch Kellaway.

English musician and singer Justin Hawkins rose to stardom along with his band, The Darkness, when he was in his late 20s with hit song "I Believe in a Thing Called Love" back in 2003 -- peaking at number two on the UK Singles Chart.

Known for his high-pitched singing, the catchy song made its way to the states and was quite popular in the early 2000s.

Today, Hawkins is still rockin' out ... He appeared as Chameleon on the UK's "The Masked Singer"

"I believe in a thing called love ... just listen to the rhythm of my heart!"

American actress Taylor Dooley was just 12 years old when she played Lavagirl -- Max's imaginary superheroine and fiery, Lavagirl in the 2005 action film "The Adventures of Sharkboy and Lavagirl 3-D."

Dooley shared the big screen with Taylor Lautner as the heroic king of the ocean who grew up caring for sharks, Sharkboy, Cayden Boyd as the lonely boy who dreams of escaping the real world, Max and George Lopez as both Max's teacher in real life AND his enemy as Mr. Electric.

Taylor wound up working with Lautner again in 2011 for the action/thriller film "Abduction."

L.A. native and American actress Jennifer Jason Leigh was just 20 years old when she scored her breakout role, Stacy -- the sophomore at Ridgemont High yearning for romance -- in the 1982 teen film "Fast Times At Ridgemont High".

Joining Jennifer included Robert Romanus as the ticket scalping salesman, Mike Damone, Phoebe Cates as the mature gal and a bit scandalous, Linda and Judge Reinhold as the hard worker just trying to have a good ole' time, Brad.

Other worthy cast mentions include Sean Penn as Jeff and Nicolas Cage as Brad's Co-worker.

American actor Patrick Richwood was 27 years old when he was cast as Dennis -- the sweet, nerdy and sprucely dressed elevator tenant -- in the classic 1990 romantic comedy "Pretty Woman."

Richwood shared the big screen with A-list actors including Richard Gere as the successful millionaire businessman, Edward Lewis, Julia Roberts as the lady of the night who turned into the ultimate love interest, Vivian Ward and Jason Alexander as the creepy lawyer, Philip Stuckey.

Almost a decade after playing the elevator tenant, Patrick took on a role in "Runaway Bride" -- another Richard Gere and Julia Roberts classic!

American songwriter and record producer Kara DioGuardi was in her late 30s when she was a judge on the popular singing competition show "American Idol" back in 2010 -- and made headlines when she flashed her bikini bod during the season 8 finale.

Sitting smack-dab in the middle of Simon Cowell, Randy Jackson and Paula Abdul ... DioGuardi's time on "American Idol" came to an end after season 9, but she continued to make moves ... like signing Jason Derulo and landing herself as head judge on Bravo's singing competition show "Platinum Hit" in 2011.

American gymnast and 3-time Olympian John Roethlisberger was 22 years old when he first represented Team USA at the 1992 Barcelona Olympics -- and later qualified for the Summer Games in Atlanta (1996) and Sydney (2000).

John comes from a long line of family gymnasts including his father, Fred Roethlisberger, who was a member of the 1968 Olympics gymnastics team, and his sister, Marie Roethlisberger, was an alternate for the 1984 Olympic gymnastics team -- where Mary Lou Retton made history!

After retiring, John started an annual summer Gymnastics Camp and is a correspondent for the 2024 Paris Olympics.

Aboriginal Australian sprinter Cathy Freeman was in her early 20s when she sprinted her way to the top of the leaderboard at the Summer Atlanta Olympics back in 1996 -- and making a triumphant return four years later to the 2000 Summer games in Sydney.

Freeman specialized in the 400 meter event with a personal best of 48.63 seconds, which to this day still ranks her as the eighth fastest woman of all time. And at the 2000 Olympics, she took the crown for her 400 meter specialty and lit the Olympic Flame!

Canadian actress Carrie-Anne Moss was in her early 30's when she first started playing Trinity -- the butt-kicking babe and computer hacker who tricks humans into thinking they're in reality -- in the sci-fi film "The Matrix" back in '99.

Carrie-Anne shared the action-packed film with Keanu Reeves as the quiet computer hacker who grew up in The Matrix, Neo, Laurence Fishburne as the intense, captain of the large flying ship (the Nebuchadnezzar), Morpheus and Hugo Weaving as the robotic and emotionless, Agent Smith.

She also starred in the 2000 thriller film "Memento" with Guy Pearce.

Romanian gymnast Nadia Comaneci was only 14 years old when she skyrocketed to stardom after becoming the first gymnast to score a perfect 10.0 at the 1976 Montreal Olympic Games.

In addition to her perfect-scoring status, the gymnastics icon scored six MORE perfect 10s and grabbed 3 gold medals. To no surprise -- but extremely difficult to do so -- she qualified for her 2nd games in 1980, taking 2 more gold medals and two 10.0s back to Romania.

Today, she's still recognized and respected as a gymnastics legend and continues to use her platform for leadership roles.

American actress Zoe Kazan was in her mid-20s when she played Gabby Adler -- the middle Adler child, obsessed with texting and still struggling with her parents' divorce -- in the 2009 Rom-Com film "It's Complicated."

Zoe shared the big screen with Hollywood greats like Meryl Streep who played Gabby's divorced mother and exquisite baker, Jane, Alec Baldwin as Gabby's father and successful attorney who attempts to rekindle things with his ex-wife, Jake, and Steve Martin as the architect and Jane's love interest, Adam.

Other worthy cast mentions include John Krasinski and Lake Bell.

Television host Damien Fahey was 22 years old when he shot to stardom hosting the afternoon MTV video countdown show "Total Request Live" after Carson Daly stepped down back in 2002.

He worked alongside popular and fellow 'TRL' hosts Vanessa Lachey and Lala Anthony and interviewed big celebs like Madonna and Vanessa Carlton!

While his 'TRL' run came to an end in 2008, his career continued to soar ... In 2009, he hosted "I'm a Celebrity...Get Me Out of Here" featuring controversial celebs at the time, Heidi Montag and Spencer Pratt.

American YouTuber Tay Zonday was 25 years old when he rose to fame -- and made national TV appearances -- after his bizarre original song "Chocolate Rain" went viral back in 2007.

Tay's popularity landed him on hit shows like "Jimmy Kimmel Live!" "Tosh.0" and even scored the front covers for popular magazines like People and The Los Angeles Times.

Almost 20 years later, the YouTube video has accumulated 138 million views, and Tay -- who has over 1 million subscribers -- is still creating original content!

"Chocolate rain, history quickly crashing through your veins!"

American actress Deirdre Quinn was in her late 20s when she played Mary Jo Wright AKA "Miss Texas" -- the southern belle representing her home state at the Miss United States beauty pageant -- in the 2000 comedy/action film "Miss Congeniality."

Deirdre shared the big screen with Sandra Bullock as the scraggly FBI agent turned beauty queen, Gracie Lou Freebush, Benjamin Bratt as the handsome swaggy FBI agent who has goo-goo eyes for Gracie, Eric, and Heather Burns as the naive baton twirler and "Miss Rhode Island," Cheryl.

American actor Josh Zuckerman was in his mid-20s when he first started playing Max Miller -- the intelligent technological entrepreneur and Naomi's hubby -- in the 2011 CW remake of the "90210" series.

Josh was part of an ensemble cast including AnnaLynne McCord as the wealthy and popular party planner, Naomi, Shenae Grimes as the bubbly and pure-hearted gal from Kansas who moved to Beverly Hills for high school, Annie and Matt Lanter as the troubled and handsome bartender, Liam.

Josh also had roles in "Sex Drive," "Kyle XY" and "Desperate Housewives."