Planet 51 Animation Gets The Rock, Biel, Scott, and Long

New Line Cinema’s CG-animated sci-fi film “Planet 51″ has just gotten its cast — Dwayne “The Rock” Johnson, Jessica Biel, Seann William Scott, and Justin Long have all signed on to voice major characters in the upcoming animated movie, which sees Johnson as an Earth pilot who crash lands on an alien planet paranoid about an alien invasion.

The film revolves around a group of residents on the eponymous planet who fear an alien invasion. Johnson will play astronaut Capt. Charles “Chuck” Baker, who arrives from Earth and confirms their worst fears. He’s forced to avoid capture so he can find his spaceship and return home.

Long will voice Lem, the local who Chuck befriends. Biel will voice Neera, the film’s female protagonist and Lem’s love interest. Scott will voice Lem’s sidekick, Skiff.

Written by Joe Stillman, “Planet 51″ is budgeted at $60 million, and will be directed by Jorge Blanco.