Nickelodeon stars: Where are they now?

Since the mid '80s, Nickelodeon has been dishing out kid-appropriate TV programming starring a bunch of young actors. But have you ever wondered what happened to those stars when they grew up? Take Nick Cannon, who started out on the network's sketch comedy show "All That" and eventually got his own self-titled spin-off show. Click to find out what he and other former Nickelodeon stars are up to today.

Since his days on Nickelodeon, Nick Cannon has grown into a super-successful rapper, DJ, actor and TV host on shows like "Wild 'N Out" and currently for "America's Got Talent." In 2014, the 34-year-old split with his wife Mariah Carey though they share adorable twinsMoroccan and Monroe.

In 1991, Melissa Joan Hart started out on Nickelodeon's "Clarissa Explains It All," playing an average teen going through everyday ups and downs.

In 1996, Melissa Joan Hart landed a new series dubbed "Sabrina the Teenage Witch," which was a huge hit and stayed on the air until 2003. The same year the now 38-year-old married Mark Wilkerson and is currently juggling raising her three boys and starring on her latest sitcom with Joey Lawrence, "Melissa & Joey."

In 2009, youngster Ariana Grande nabbed the role of Cat Valentine on the Nickelodeon show "Victorious." When that series ended she got her own spin-off called "Sam & Cat." But acting wasn't her only calling ...

Since dropping her debut album in 2013, Ariana Grande has become a pop sensation tearing up the airways with her larger-than-life voice on hit tracks like "Problems." And her love life has been on fire too. Since recently splitting with Jai Brooks, she's been getting hot and heavywith rapper Big Sean.

Britney Spears' baby sister Jamie Lynn Spears wanted to be in the biz too. She started off acting on Nickelodeon's "All That" before landing a role on the network's show "Zoey 101" in 2005.

Jamie Lynn Spears went on to star in ABC Family's "Miss Guided" before getting pregnant at 16 years old. After taking time to raise her beautiful daughter Maddie, she recently released a country music single dubbed "How Could I Want More." In 2014, the 23-year-old said her "I dos" with Jamie Watson.

Kenan Thompson debuted his comedic chops as a teenager on Nickelodeon's "All That" and in 1996, got a spin-off show with his acting sidekick Kel Mitchell on "Kenan & Kel."

Kenan Thompson, 36, continued to work alongside Kel Mitchell in the 1997 film "Good Burger." He nabbed a ton more solo film roles and in 2003 landed a groundbreaking role on "Saturday Night Live." In 2011, the sketch comedian tied the knot to model Christina Evangeline and they recently welcomed a baby girl.

Julia Roberts' niece Emma Roberts got her start as a youngster on Nickelodeon's series "Unfabulous" in 2004. And my oh my, how she's matured since then.

Emma Roberts went on to star in movies like "Scream 4" and "We're the Millers" alongside Jennifer Aniston. Most recently she joined the cast of the "American Horror Story" TV series. Despite having a violent public argument with her actor boyfriend Evan Peters in 2013, they worked out their issues and got engaged later that year.

In 2005, 12-year-old Victoria Justice landed the lead in Nickelodeon's "Zoey 101" and went on to star in the network's musical series "Victorious" in 2010.

Since the recent end of her Nick days, Victoria Justice released the single "Gold" in 2013 and has been working on recording an album while continuing to act. The now 21-year-old has been dating her "Naomi and Ely's No Kiss List" co-star Pierson Fode.

Like his buddy Kenan Thompson, Kel Mitchell started out on Nickelodeon's sketch comedy show "All That" and went on to star in the spin-off "Kenan & Kel." We can't ever forget his deep love for orange soda.