• Johnny Knoxville as Percy Jackson
  • Bam Mergera as Luke Castellan
  • Ryan Dunn as Grover Underwood
  • Chris Pontius as Tyson
  • Steve-O as Chiron
  • Dave England as Polyp[hemus
  • Preston Lacy as Dionysus
  • Wee-Man as Chris Rodriguez
  • Brandon Novak as Mr. Brunner (cameo)
  • Kat Von D as Clarisse La Rue (cameo)
  • Mark Zupan as Ethan Nakamura (cameo)
  • John Waters as Young Grover Underwood (cameo)
  • and more

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