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    19 Celebrities You Might Not Have Known Did Voice-Overs On "SpongeBob SquarePants"

    All of these famous guest stars on SBSP were right under our nose this whole time!

    1. Victoria Beckham as Queen Amphitrite:

    Mike Marsland / WireImage

    Episode: "The Clash of Triton"

    2. Dennis Quaid as Grandpa Redbeard:

    Joe Scarnici / WireImage

    Episode: "Grandpappy the Pirate"

    3. Kristen Wiig as Madame Hagfish:

    Getty Images

    Episode: "The Curse of the Hex"

    4. Ray Liotta as Trevor:

    Henry S. Dziekan III / WireImage

    Episode: "WhoBob WhatPants?"

    5. Andy Samberg as Colonel Carper:

    Episode: "Hello Bikini Bottom"

    6. Amy Poehler as Granny:

    Paul Morigi / WireImage

    Episode: "Have You Seen This Snail?"

    7. Patton Oswalt as Jim the Fry Cook:

    Getty Images

    Episode: "The Original Fry Cook"

    8. Johnny Knoxville as Johnny Krill:

    Episode: "Extreme Spots"

    9. Dee Snider as Angry Jack:

    Episode: "Shell Shocked"

    10. David Bowie as Lord Royal Highness:

    Episode: "Atlantis SquarePantis"

    11. Ginnifer Goodwin as the Teenage Mermaid:

    Ethan Miller / Getty Images

    Episode: "Welcome to the Bikini Bottom Triangle"

    12. Mark Hamill as Moth:

    Episode: "Night Light"

    13. Alton Brown as Nicholas Withers:

    Episode: "House Fancy"

    14. Chris Elliot as Lord Poltergeist

    Episode: "Ghoul Fools"

    15. Biz Markie as Kenny the Cat:

    Episode: "Kenny the Cat"

    16. Amy Sedaris as Ma Angler:

    Episode: "Trenchbillies"

    17. Michael McKean as Captain Frostymug:

    Episode: "License to Milkshake"

    18. Gene Simmons as Sea Monster:

    Episode: "20,000 Patties Under the Sea"

    19. Johnny Depp as Jack Kahuna Laguna:

    Karwai Tang / WireImage

    Episode: "SpongeBob vs. The Big One"

    Via this Wikipedia page that lists all of the show's guest actors.

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