© Getty Images

David Bowie - Bowie guest starred in the 'Atlantis SquarePantis' episode, portraying Lord Royal Highness.

© Getty Images

David Hasselhoff - Hasselhoff starred as himself in 'The SpongeBob SquarePants Movie.'

© Getty Images

Scarlett Johansson - Johansson played Princess Mindy in 'The SpongeBob SquarePants Movie.'

© Getty Images

Victoria Beckham - Posh Spice was a surprising guest, playing Queen Amphitrite in 'The Clash of Triton' episode.

© Getty Images

Antonio Banderas - Banderas played Burger-Beard the Pirate in the second 'SpongeBob' movie.

© Getty Images

Jon Hamm - Hamm is perhaps known best for playing Don Draper in 'Mad Men.' The character was spoofed in a 'SpongeBob' episode, with Hamm voicing Don Grouper.

© Getty Images

J. K. Simmons - The Oscar-winning actor was magic as Maestro Mackerel in 'Snooze You Lose,' from season 10.

© Getty Images

Betty White - Betty White was a delight as Beatrice in the 'Mall Girl Pearl' episode.

© Getty Images

Aubrey Plaza - White was joined by Aubrey Plaza in 'Mall Girl Pearl.' She played the character of Nocturna.

© Getty Images

Alec Baldwin - The star of '30 Rock' made an impression as Dennis in 'The SpongeBob SquarePants Movie.'

© Getty Images

Steve Buscemi - Buscemi showed up as Dorsal Dan in 'The Getaway,' from season 10.

© Getty Images

Rosario Dawson - The actress was one of many celebrity cameos in the special 'Truth or Square.'

© Getty Images

Will Ferrell - Playing himself, Ferrell also showed up during 'Truth or Square.'

© Getty Images

Ricky Gervais - Gervais served as the narrator and played himself in 'Truth or Square.'

© Getty Images

LeBron James - Yup! The basketball icon also showed up in 'Truth or Square' as himself.

© Getty Images

Kristen Wiig - Wiig was a treat as Madame Hagfish in 'The Curse of the Hex' episode.

© Getty Images

Gene Simmons - The Kiss guitarist appeared in the episode '20,000 Patties Under the Sea,' alongside his wife, Shannon Tweed Simmons.

© Getty Images

Amy Poehler - Poehler played the character of Grandma in the 'Have You Seen This Snail?' episode.

© Getty Images

Pantera - Heavy metal rockers Pantera appeared in the episode 'Prehibernation Week.' They starred as themselves.

© Getty Images

Jeff Garlin - The comedic actor played 'Cuddle E. Hugs' in the episode of the same name.

© Getty Images

Johnny Knoxville - The 'Jackass' star spoofed himself in 'Extreme Spots,' an episode in which he played Johnny Krill.

© Getty Images

Andy Samberg - Samberg played concert promoter Colonel Carper in an episode of the show.

© Getty Images

John Goodman - Goodman has a golden voice, so he was the perfect fit for Santa Claus (also, 'It's a SpongeBob Christmas!' is a delightful holiday watch).

© Getty Images

Ray Liotta - The 'Goodfellas' actor showed up as Trevor in 'What Ever Happened to SpongeBob?' (also known as 'WhoBob WhatPants?').

© Getty Images

Mark Hamill - Best known as Luke Skywalker, this actor appeared as The Moth in the episode 'Night Light.'

© Getty Images

Patton Oswalt - The stand-up played Jim in 'The Original Fry Cook' episode.

© Getty Images

Marion Ross - Marion Ross has guest starred as Grandma SquarePants multiple times.

© Getty Images

Amy Sedaris - The actress and comedian played Ma Angler in the episode 'Trenchbillies.'

© Getty Images

Johnny Depp - This A-list actor made an appearance as Jack Kahuna Laguna in the 'SpongeBob SquarePants vs. The Big One' episode.

© Getty Images