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Elizabeth Banks

BEVERLY HILLS, CA - DECEMBER 07: Actress Elizabeth Banks arrives at the March Of Dimes Celebration Of Babies Luncheon at Beverly Hills Hotel on December 7, 2012 in Beverly Hills, California. (Photo by Jon Kopaloff/FilmMagic)

Stars Applaud Angelina Jolie on Twitter

Angelina Jolie's New York Times op-ed about her choice to undergo a double mastectomy to greatly decrease her high risk of breast cancer  has sparked lots of celeb reactions on Twitter, including some from stars who've dealt with breast cancer themselves. Check out what they're saying and join the conversation on Twitter.