Photos: All grown up: Child star transformations Rapper and actor Shad Moss, aka Bow Wow, has announced his retirement from rap at the ripe old age of 29. Hide Caption 1 of 60

Photos: All grown up: Child star transformations Teen idols Lil' Bow Wow and Aaron Carter posed after the 2000 Billboard Music Awards Hide Caption 2 of 60

Photos: All grown up: Child star transformations Danny Pintauro, 39, starred in the 1980s sitcom "Who's the Boss?" Last year he married Wil Tabares, and recently he revealed that he has been HIV-positive since 2003. Hide Caption 3 of 60

Photos: All grown up: Child star transformations Pintauro played Angela Bower's son, Jonathan, in "Who's the Boss?" Angela Bower was played by Judith Light. Hide Caption 4 of 60

Photos: All grown up: Child star transformations Jonathan Taylor Thomas turned 34 on Tuesday, September 8, and fans are wishing they could see him more. He pops up occasionally, like on "Home Improvement" co-star Tim Allen's ABC series "Last Man Standing," which feels like deja vu all over again. Hide Caption 5 of 60

Photos: All grown up: Child star transformations Thomas (at right with Zachery Ty Bryan, left, and Taran Noah Smith) first snagged hearts as one of the sons on Allen's hit '90s show. Hide Caption 6 of 60

Photos: All grown up: Child star transformations The late Steve Irwin's daughter, Bindi Irwin, has grown up to be quite the conservationist, just like her dad. She's also become a bit of a celeb like her father and was recently recruited for season 21 of "Dancing With the Stars." Hide Caption 7 of 60

Photos: All grown up: Child star transformations "Crocodile Hunter" Steve Irwin with daughter Bindi in 2006 at Uluru, Australia. Hide Caption 8 of 60

Photos: All grown up: Child star transformations Matthew Lewis, who starred as the shy and unassuming Neville Longbottom in the "Harry Potter" movies, has grown into a strapping young man. He buffed up for roles as a soldier in "Bluestone 42" and an athlete in "Me Before You." Hide Caption 9 of 60

Photos: All grown up: Child star transformations Lewis sported a slightly different look as Neville in the "Harry Potter" films. Hide Caption 10 of 60

Photos: All grown up: Child star transformations Along with her "Harry Potter" co-star Lewis, Emma Watson's proving that she's not little Hermione anymore. The actress played a thief in 2013's "The Bling Ring" and an ax-carrying marauder in "This Is the End." Hide Caption 11 of 60

Photos: All grown up: Child star transformations A young Watson as frizzy-haired Hermione in "Harry Potter." Hide Caption 12 of 60

Photos: All grown up: Child star transformations Daniel Radcliffe's development has been watched by millions as he came of age in the "Harry Potter" movie franchise, which launched when he was 12. By 2007, Radcliffe was ready to show how grown-up he'd become, starring in "Equus" -- a stage production that required some nudity. Hide Caption 13 of 60

Photos: All grown up: Child star transformations As a child, Radcliffe may have become the world's favorite wizard as "Harry Potter." Hide Caption 14 of 60

Photos: All grown up: Child star transformations Jaden Smith has grown up since his breakout role with his dad, Will, in "The Pursuit of Happyness." Although he once again starred with his father in 2013's "After Earth," Jaden isn't a kid anymore. Hide Caption 15 of 60

Photos: All grown up: Child star transformations Smith was a baby-faced child star in 2006's "The Pursuit of Happyness." Hide Caption 16 of 60

Photos: All grown up: Child star transformations Jayden's sister, Willow, has followed her big brother into show business. In 2011, she had a hit single with "Whip My Hair." Hide Caption 17 of 60

Photos: All grown up: Child star transformations Smith appeared with her dad in the 2007 film "I Am Legend." Hide Caption 18 of 60

Photos: All grown up: Child star transformations Fans were excited to see a grown-up Haley Joel Osment in the "Entourage" movie in 2015. Hide Caption 19 of 60

Photos: All grown up: Child star transformations Osment first found fame as as the child star of 1999's "The Sixth Sense." Hide Caption 20 of 60

Photos: All grown up: Child star transformations Tyler Posey appeared on Fox's Teen Choice Awards in August 2014 in Los Angeles with Jennifer Lopez. It was a throwback to years earlier when ... Hide Caption 21 of 60

Photos: All grown up: Child star transformations Posey co-starred with Lopez in "Maid in Manhattan" in 2002. Hide Caption 22 of 60

Photos: All grown up: Child star transformations Keke Palmer became the first black Cinderella on Broadway in 2014. She's worked steadily through most of her childhood. Hide Caption 23 of 60

Photos: All grown up: Child star transformations Palmer got her first major role in "Akeelah and the Bee" in 2006. Hide Caption 24 of 60

Photos: All grown up: Child star transformations Angus T. Jones, left, grew up before viewers' eyes on the hit CBS series "Two and a Half Men." Hide Caption 25 of 60

Photos: All grown up: Child star transformations Jones was a chubby-cheeked youth in 2003 at the premiere of his movie "Bringing Down the House." Hide Caption 26 of 60

Photos: All grown up: Child star transformations Justin Bieber is now in his 20s and, according to his mentor Usher , still growing up. But between the tattoos, the vandalism accusations and a recent arrest , Biebs is not the same "Baby" singer we met in 2009. Hide Caption 27 of 60

Photos: All grown up: Child star transformations Back then, Bieber was a fairly innocent teen heartthrob. Hide Caption 28 of 60

Photos: All grown up: Child star transformations Twerking Miley Cyrus (with Robin Thicke during the 2013 MTV Video Music Awards at in New York) was a far cry from the child star many remembered. Hide Caption 29 of 60

Photos: All grown up: Child star transformations In 2006, Cyrus was known as the star of Disney's "Hannah Montana." Hide Caption 30 of 60

Photos: All grown up: Child star transformations Selena Gomez's appearance hasn't changed dramatically since she starred on the Disney Channel's "Wizards of Waverly Place," but her work sure has. Gomez has stretched herself with more mature content, such as the risqué movie "Spring Breakers" and her suggestive single "Come and Get It." Hide Caption 31 of 60

Photos: All grown up: Child star transformations Gomez was still a youngster in 2007 when she attended the premiere of Walt Disney's "Pirates Of The Caribbean: At World's End." Hide Caption 32 of 60

Photos: All grown up: Child star transformations Vanessa Hudgens has appeared in more adult projects such as "Spring Breakers" and "Machete Kills." Hide Caption 33 of 60

Photos: All grown up: Child star transformations Hudgens came to fame as a Disney Channel star in 2006 but soon stepped away from her wholesome "High School Musical" roots. Hide Caption 34 of 60

Photos: All grown up: Child star transformations Oh, how you have grown, Zac Efron. The "High School Musical" star is now appearing in more adult roles, including 2015's "We Are Your Friends." Hide Caption 35 of 60

Photos: All grown up: Child star transformations His fans will still always remember him as the fresh-faced Troy Bolton in the "High School Musical" franchise. Hide Caption 36 of 60

Photos: All grown up: Child star transformations Keshia Knight Pulliam held a pretty iconic role as a youngster, but these days, she is all grown up and appearing in TV movies like "The Love Letter." Hide Caption 37 of 60

Photos: All grown up: Child star transformations Pulliam will always be remembered as Rudy Huxtable on "The Cosby Show." Hide Caption 38 of 60

Photos: All grown up: Child star transformations Raven-Symone now has a gig as one of the co-hosts on "The View." Hide Caption 39 of 60

Photos: All grown up: Child star transformations Her breakout role as Olivia on "The Cosby Show" led to her very successful Disney series "That's So Raven." Hide Caption 40 of 60

Photos: All grown up: Child star transformations Alyssa Milano starred as a preteen on the '80s series "Who's the Boss?" but also had a hit as an adult with "Charmed." Hide Caption 41 of 60

Photos: All grown up: Child star transformations Milano's role as Samantha Micelli, the daughter of a former athlete who accepts a job as a housekeeper for an advertising executive with a young son on "Who's the Boss?" first made her a star. Hide Caption 42 of 60

Photos: All grown up: Child star transformations Macaulay Culkin turned a scream and an exaggerated expression into a blockbuster movie franchise when he starred in 1990's "Home Alone" at the age of 10. He went on to star in 1991's "My Girl," but in recent years, he has not been a huge fan of being on camera. In April 2013, he ripped into paparazzi in the United Kingdom for trying to take his photo. Hide Caption 43 of 60

Photos: All grown up: Child star transformations His "Home Alone" films are just as popular now as they were in the 1990s. Hide Caption 44 of 60

Photos: All grown up: Child star transformations "Mad Men" fans have watched Kiernan Shipka grow up as Sally, the daughter of protagonist Don Draper. Having starred on the series since she was 7, Shipka's gone from being a little ballerina with a lisp to a teen girl with enviable poise. Hide Caption 45 of 60

Photos: All grown up: Child star transformations Shipka as a youngster when she first snagged the role of Sally on "Mad Men." Hide Caption 46 of 60

Photos: All grown up: Child star transformations One minute, Abigail Breslin was a 10-year-old "Little Miss Sunshine," and the next thing we know, she's flashing her bra in 2011's "New Year's Eve." The actress is now grown-up enough to take on the older sister role, as she did in the 2013 release "Ender's Game." She also nabbed a role in the 2015 TV series "Scream Queens." Hide Caption 47 of 60

Photos: All grown up: Child star transformations Many still remember the actress as Olive Hoover in the 2006 film "Little Miss Sunshine." Hide Caption 48 of 60

Photos: All grown up: Child star transformations Designers Mary-Kate Olsen, left, and Ashley Olsen are a force to be reckoned with in the fashion world. Hide Caption 49 of 60

Photos: All grown up: Child star transformations The Olsen twins have been in the entertainment industry since they were literally in diapers; the pair took turns playing Michelle Tanner on "Full House" from 1987 to 1995. They went on to star in their own movies before starting their fashion lines, Elizabeth and James and The Row. Hide Caption 50 of 60

Photos: All grown up: Child star transformations These days, Jonathan Lipnicki is old enough to play Renee Zellweger's love interest. Hide Caption 51 of 60

Photos: All grown up: Child star transformations He's best known for his role as Zellweger's cute-beyond-words son in 1996's "Jerry Maguire." Hide Caption 52 of 60

Photos: All grown up: Child star transformations Chloë Grace Moretz was a "Kick-Ass" actress even as a kid. She outgrew her baby look but not her action moves: The star appeared in the "Kick-Ass" sequel in 2013. Hide Caption 53 of 60

Photos: All grown up: Child star transformations As a child, Moretz also had starring roles in movies like "The Amityville Horror," which she appeared in at age 8. Hide Caption 54 of 60

Photos: All grown up: Child star transformations Dakota Fanning has appeared in so many movies and TV shows since age 6 that we could put together her baby book. She's now not only an acclaimed actress but also a model. Hide Caption 55 of 60

Photos: All grown up: Child star transformations Fanning was quite the tyke on "The Tonight Show with Jay Leno" in 2002. Hide Caption 56 of 60

Photos: All grown up: Child star transformations Nowadays, Lindsay Lohan is known more for troubles than for her career. Hide Caption 57 of 60

Photos: All grown up: Child star transformations Lohan showed off her acting prowess at 12 when she played a set of identical twins in the 1998 remake of "The Parent Trap." She went on to star in movies like "Freaky Friday" (2003) and "Mean Girls" (2004), but her tumultuous private life soon interfered with her career. Hide Caption 58 of 60

Photos: All grown up: Child star transformations Anna Chlumsky landed a hit comedy with HBO's "Veep" and welcomed her first child in 2013. Hide Caption 59 of 60