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Chinese actor Zhenwei Wang was only 14 years old when he played Cheng -- one of Master Li's skilled marital arts students who hands the trophy over to Dre during the final match -- in the 2010 family/action film "The Karate Kid."

Joining Zhenwei on the big screen included Jaden Smith as the bullied teenager transitioning to a disciplined martial artist, Dre, Jackie Chan as Dre's Kung Fu mentor who also provides life lessons, Mr. Han, and Luke Carberry as the nice and friendly kid, Harry.

Wang has performed stunts for other movies like "12 Hours" and "Shang-Chi and the Legend of the Ten Rings."

American actress Jashaun St. John was just a teenager when she rose to fame playing Blue -- the sensitive and quiet girl from New Mexico, traveling with her bestie -- in the 2015 adventure/drama film "The Short History Of The Long Road."

Jashaun shared the big screen with Sabrina Carpenter as the self-sufficient teen who lives in a van, searching for her mother, Nola, Steven Ogg as Nola's penny-pinching father who dies, Clint, and Danny Trejo as the mechanic shop owner who takes Nola under his wing, Miguel.

In 2021, St. John was in Marvel's "Eternals" with Angelina Jolie.

American actor and model Greg Sestero was in his mid-20s when he played the role of Mark -- the promiscuous friend who enjoys passing the football and also cheats with Lisa -- in the 2003 cult classic, "The Room."

Greg shared the big screen with Tommy Wiseau as the socially awkward dude and Lisa's fiancé, Johnny, Juliette Danielle whose sheltered life leaves her making poor choices, Lisa and Carolyn Minnott as Lisa's manipulative mother, Claudette.

When Mark was a junior in high school, he started modeling -- working in Paris and Milan for big designers like Giorgio Armani.

American musician and songwriter Morris Day -- and the funky frontman for the Minnesota music consortium, The Time -- was in his mid-20s when he shot to stardom with jams like "Jungle Love" in the '80s.

His charting single "Fishnet" reached number 23 on the Hot 100 chart, and with his popular bops, Day dabbled on the big screen -- playing himself in Prince's 1984 movie "Purple Rain" and "Graffiti Bridge" (1990).

As far as TV acting roles -- he was on NBC's sitcom series "227" with Marla Gibbs and ABC's "New Attitude" with Sheryl Lee Ralph.

American actress Wendy Schaal was in her mid-30s when she played Bonnie Rumsfield -- the blonde trophy wife who finds the neighbor's dog -- in the 1989 funny film "The 'Burbs."

Wendy shared the big screen with legendary actor Tom Hanks as the paranoid man who attempts to be logical, Ray, Bruce Dern as the veteran who is jealous of his neighbor's lawn, Mark, and Corey Feldman as the neighborhood's tacky neighbor who stirs up trouble, Ricky.

Wendy was in other Joe Dante (director) films like "Innerspace" and "Small Soldiers."

American actress Vanessa Baden was only 10 years old when she first starting playing Kyra -- the Kel crushing and sassy little sister of Kenan in the '90s Nickelodeon show "Kenan & Kel."

Vanessa was part of an ensemble cast including Kel Mitchell as the chill and clumsy high school student, Kel, Kenan Thompson as the confident and smart (high schooler) and part-time grocery store worker, Kenan, and Teal Marchande as Kenan's loving and patient mother, Sheryl.

Vanessa was also also a child star on Nickelodeon's "Gullah Gullah Island" from 1994-1998.

Scottish actor Ewen Bremner was in his mid-20s when he was cast to play Spud -- the bed-soiling heroine addict who lives off unemployment benefits -- in the 1996 drug drama "Trainspotting."

Bremner hit the big screen with Ewan McGregor as the cynical drug addict who struggles with healthy relationships, Mark, Jonny Lee Miller as Mark's best friend who is opportunistic with making money, Sick Boy and Robert Carlyle as the violent alcoholic, Franco.

Ewen's other notable roles include Shawn Nelson in "Black Hawk Down" and Julien in "Julien Donkey-Boy."

American actress Olivia Thirlby was 20 years old when she was cast to play Leah -- the quirky cheerleader who offers advice to her bestie Juno during her teen pregnancy -- in the romantic comedy "Juno" back in 2007.

Olivia shared the big screen with Elliot Page as the sarcastic and rebellious high schooler who finds themselves pregnant, Juno, Michael Cera as the track runner and one of Juno's best friends who accidentally gets Juno pregnant, Paulie and Jennifer Garner as the adoptive mother of Juno's child, Vanessa.

American actress Madeline Zima was only 7 years old when she first started playing Little Grace -- the sweet, sensitive and youngest child wise beyond her years -- on the family-friendly '90s sitcom "The Nanny."

Joining Madeline on the set included Fran Drescher as the humorous nanny who looks after the Sheffield children, Fran Fine, Lauren Lane as the functioning alcoholic who crushes on Maxwell Sheffield, C.C. Babcock and Daniel Davis as the Sheffield's protective chauffeur and butler with a British accent, Niles.

Zima is also known for her roles on Showtime's "Californiacation" and NBC's "Heroes."

American film and television actor Jermaine Hopkins was 18 years old when he played Steel -- the friendly thieving sidekick who is murdered in an alley -- in the crime/thriller film "Juice" back in 1992.

Hopkins shared the big screen with Tupac Shakur as the insecure teen who murders Steel, Bishop, Omar Epps as the chill and aspiring DJ whose poor decisions lead to Bishop's death, Q, and Ernest Dickerson as the friend who wants to take charge and ignore Bishop's requests, Raheem.

Other noteworthy cast mentions include Samuel L. Jackson as Trip and Queen Latifah as Ruffhouse M.C.

American singer-songwriter and actress Jenny Lewis was just a teenager when she played Haley -- the tough girl from Nevada, traveling cross-country with her father -- in the 1989 family adventure film "The Wizard."

Joining Lewis on set included Fred Savage as the protective brother who flees Utah and heads to California, Corey ... and Luke Edwards as the sad and moody brother striving to win the Video Armageddon, Jimmy.

Her popularity in the late '80s also stemmed from her role in the film "Troop Beverly Hills."

Jenny is the lead singer of the indie rock band, Rilo Kiley, which is set to reunite at the Just Like Heaven music festival next month!

British actress Rebecca Reid was in her mid-20s when she first played Nadia -- Cece's friend and self-obsessed Russian model always looking for a good time -- on Fox's "New Girl" back in 2011.

Reid was part of an ensemble cast featuring Zooey Deschanel as the quirky, over-the-top school teacher who loves to sing, Jess, Hannah Simone as the confident model who lost her father during childhood, Cece, and Jake Johnson as the sarcastic, lazy bartender and Jess' roommate, Nick.

Reid is also a stand-up comedian, performing at Hollywood's Comedy Story and Hollywood Improv.

American actor Darryl M. Bell was in his early 20s when he first started playing Ron -- the flirty musician and Dwayne's popular roommate -- in the long-running college comedy "A Different World" back in 1987.

Joining Darryl in front of the cameras included Kadeem Hardison as the nerdy and flirty guy with flip-up shades, Dwayne Wayne, Jasmine Guy as the spoiled art buyer who eventually marries Dwayne, Whitley and Charnele Brown as Whitley's roommate who cozies up to Ron, Kimberly.

Bell is also known for playing Big Brother X-Ray in the 1988 Spike Lee film "School Daze."

Michael Schur was in his late 20s when he first started playing Mose -- Dwight's strange and awkward cousin with a sheltered lifestyle -- on the popular sitcom series "The Office" back in 2005.

Schur was joined by Rainn Wilson as the Special Projects Manager, Dwight K. Schrute, John Krasinski as the monogamous father-of-two, Jim Halpert ... and of course Ed Helms as the pitch-perfect boss, Andy "Nard-Dog" Bernard.

In addition to playing Mose ... Michael wrote for "The Office" and is a brilliant producer and director -- working on shows like "Parks and Recreation" and "The Good Place."

Canadian actress Peyton Kennedy was a young teen when she first played Kate -- the shy sophomore at Boring High and A/V Club member -- on Netflix's drama "Everything Sucks" back in 2018.

Joining Kennedy included Sydney Sweeney as the jealous popular drama club student,  Emaline, Jahi Di'Allo Winston -- also a member of the A/V Club -- who falls in love with Kate, Luke, and Rio Mangini as Luke's sarcastic and nerdy best friend, McQuaid.

You may also recall seeing Peyton on "Grey's Anatomy," "The Captive," "American Fable" and "Lavender."

American actor Tyrin Turner was 20 years old when he played Caine Lawson -- the young man struggling to leave his troubled past behind and move towards a better future -- in the 1993 South Central film "Menace II Society."

Turner shared the big screen with Larenz Tate as the brutal and callous gang member who doesn't hesitate to kill, O-Dog, Jada Pinkett Smith as Caine's resilient girlfriend, Ronnie and Samuel L. Jackson as the dangerous and destructive drug dealer, Tat.

Turner also played the principal character in Janet Jackson's "Rhythm Nation" back in 1989.