Actress Reese Witherspoon..premiere of "Monsters vs. Aliens" at the Gibson amphitheatre in Universal City, California

Actress Reese Witherspoon, who gives voice to Ginormica in the movie, poses at the premiere of "Monsters vs. Aliens" at the Gibson amphitheatre in Universal City, California March 22, 2009. The movie opens in the U.S. on March 27

UNIVERSAL CITY, CA - MARCH 22: Actress Reese Witherspoon arrives at the premiere of Dreamworks' 'Monsters Vs. Aliens' held at the Gibson Amphitheatre on March 22, 2009 in Universal City, California.