9 Celebs You Had No Idea Appeared On Nickelodeon

While Nickelodeon shows, especially older ones, often seem like weird worlds of their own separate from the entertainment business, turns out a lot of famous celebrities have appeared on Nickelodeon. Some of the celebs didn't actually appear appear, sure — but they leant their voices to characters on shows like Rugrats, Spongebob Squarepants, and The Fairly Odd Parents, so it totally counts. For some celebs, these were their earliest television roles, when they were trying to break into the industry — other already famous celebrities appeared in cameo roles as a novelty and ratings boost.

With many Nickelodeon shows in like to receive potential reboots, it's fun to go back and watch a few episodes of those old classic, which often provide a time capsule back to childhood. One of those benefits of re-watching includes realizing, oh, I had no idea that she was on this show!

While there are quite a few celebrities who started out on Nickelodeon and continued to be associated with the network and with children's entertainment — such as Drake and Josh Bell, as well as Ariana Grande —there are many who have grown far past their Nickelodeon roots. Here are a few celebrities who you totally forgot, or never realized, appeared on or leant their voices to your favorite Nickelodeon shows.

Kim Cattrall

Since you (hopefully) were not watching Sex and the City and Rugrats at the same time, you might not have noticed the Samantha Jones herself voicing Melinda Finster, Chuckie's biological mother. This role was actually pre-SATC, if you can imagine such a world.

Victoria Beckham

Beckham appeared as Queen Amphitrite in the Spongebob Squarepants episode "The Clash of Triton."

Serena Williams

The world's greatest athlete voiced the kind prison guard Ming on an episode of Avatar: The Last Airbender.

Emma Stone

Stone appeared briefly on iCarly as a megafan. She freaks out.

Amy Poehler

Back in 2005, way before Parks and Recreation, Poehler voiced Spongebob's crazy Grandma on the episode "Have You Seen This Snail?"

Chord Overstreet

Before his big break on Glee, Overstreet played the dreamy model/singer Eric, who Carly met via speed dating on iCarly.

Simon Cowell

Cowell played a parody of himself called "Simon Sparklefield" on Fairly Odd Parents.

Marisa Tomei

Tomei voiced the villainous Bree Blackburn in The Wild Thornberrys Movie.

Vanessa Hudgens

Before her big break in High School Musical, Hudgens was on Drake and Josh. She kissed Drake!

There are many more celebrities who have publicly and privately leant their voices to Nickelodeon shows. Looks like you'll have to take a trip down memory lane to find some more.