The many faces of Renee Zellweger

What did Renee Zellweger do to her face? The starlet debuted a drastically different look, leaving us wondering exactly what she's had done. Click through to see Zellweger's face through the years.  (Reuters)

Back in high school, Renee Zellweger sported some seriously big hair and a young, fresh face. That face changed a lot in the years to follow. <a target="_blank" href="http://www.snakkle.com/galleries/hide-the-hairspray-check-out-your-favorite-stars-sporting-seriously-big-hair/">Click here to see more stars with big hair from Snakkle.</a> <br>   (Seth Poppel / Yearbook Library)

A young Renee Zellweger poses as she arrives for the premiere of Universal Pictures' "One True Thing" in New York September 13, 1998. <a target="_blank" href="http://popcrush.com/10-celebrities-commercials-before-they-were-famous-video/">PHOTOS: Stars before they were famous</a>. (Reuters)

Renee Zellweger holds her award for Best Supporting Actress for "Cold Mountain" at the BAFTA awards in London, February 15, 2004. (Reuters)

Renee arrives at the Cinema Palace in Venice September 5, 2005 in a pair of shades. <a target="_blank" href="http://www.tmz.com/photos/2014/10/21/renee-zellweger-through-the-years/images/2014/10/21/1021-renee-zellweger-through-years-00-jpg/">PHOTOS: Renee through the years</a> (Reuters)

Renee Zellweger poses at the premiere of "Leatherheads" at the Grauman's Chinese theatre in Hollywood, California, March 31, 2008. <a target="_blank" href="http://popcrush.com/celebrities-without-makeup-photos/">PHOTOS: Stars without makeup</a> (Reuters)

Renee Zellweger arrives on the red carpet for the screening of the movie "My One and Only" at the 59th Berlinale film festival in Berlin February 12, 2009. <a target="_blank" href="http://popcrush.com/plastic-surgery-pictures/">PHOTOS: Stars before and after plastic surgery</a> (Reuters)

Actress Renee Zellweger debuts a different look at an event in Los Angeles November 20, 2010. <a target="_blank" href="http://popcrush.com/heidi-montag-plastic-surgery-regrets/">MORE: Heidi Montag regrets her plastic surgery</a> (Reuters )

A very changed Renee Zellweger arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the "Schiaparelli and Prada: Impossible Conversations" exhibition in New York May 7, 2012.  (Reuters)

An unrecognizable Renee Zellweger waves at the 21st annual ELLE Women in Hollywood Awards in Los Angeles, California October 20, 2014.  (Reuters)