Renee Zellweger through the years

Published On: Jan 20 2012 02:45:07 PM CST   Updated On: Apr 25 2014 09:24:12 AM CDT

Oscar-winner Renee Zellweger, who celebrates her 45th birthday on April 25, has become one of Hollywood's mainstays over the years. Let's take a look back at her career so far.

Zellweger through years - Brunette 2004
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Kieran Doherty/Reuters

A brunette Zellweger poses for photographers as she leaves a U.S. presidential election party at the National Portrait Gallery in London on Nov. 3, 2004.

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