Original: Monsters vs. Aliens features the voices of Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Conrad Vernon, Rainn Wilson, Kiefer Sutherland, Stephen Colbert, and Paul Rudd.
Simplified: Monsters vs. Aliens has the voices of Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Conrad Vernon, Rainn Wilson, Kiefer Sutherland, Stephen Colbert, and Paul Rudd.