Reese Witherspoon: Blue Carpet Birthday Girl

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Birthday girl Reese Witherspoon shimmers on the blue carpet premiere of her new animated flick, Monsters vs. Aliens, on Sunday afternoon (March 22) in Universal City, Calif.

The 33-year-old actress stood out in a Rodarte Fall 2009 silver and green dress. She completed her red carpet look with fierce gray and yellow heels.

Monsters vs. Aliens opens in theaters on March 27 and is also voiced by Kiefer Sutherland, Stephen Colbert, Paul Rudd, Rainn Wilson, Will Arnett and Hugh Laurie.

35+ pics inside of Reese Witherspoon premiering Monsters vs. Aliens…