Monsters vs. Aliens Premiere (29 images)

Actor Jack Black attends the premiere of the animated motion picture "Monsters vs. Aliens", in Universal City, California on March 22, 2009. (UPI Photo/Jim Ruymen)

Actress Reese Witherspoon, who gives voice to Ginormica in the animated motion picture "Monsters vs. Aliens", attends the premiere of the film in Universal City, California on March 22, 2009. (UPI Photo/Jim Ruymen)

Actors Will Arnett and Amy Poehler, who give voices respectively to The Missing Link and Computer in the animated motion picture "Monsters vs. Aliens", attend the premiere of the film in Universal City, California on March 22, 2009. (UPI Photo/Jim Ruymen)

Actors Hugh Laurie (L) and Seth Rogan, who give voices to Cockroach and B.O.B. respectively in the animated motion picture "Monsters vs. Aliens", attend the premiere of the film in Universal City, California on March 22, 2009. (UPI Photo/Jim Ruymen)