Angelina Jolie -- I Had a Double Mastectomy

Angelina Jolie underwent a double mastectomy procedure -- the removal of both of her breasts -- in order to minimize her risk of breast cancer ... the actress revealed.

Jolie penned an op-ed published in the New York Times, in which she reveals, "Doctors estimated that I had an 87 percent risk of breast cancer and a 50 percent risk of ovarian cancer."

She continues, "Once I knew that this was my reality, I decided to be proactive."

37-year-old Jolie says she completed the 3 months of medical procedures on April 27. She will continue to document her experience on the website for the Pink Lotus Breast Center, where she was (and still is being) treated.

The PLBC has treated stars like Sheryl Crow and Shannon Tweed.

"I am fortunate to have a partner, Brad Pitt, who is so loving and supportive," Jolie writes.

"For any woman reading this, I hope it helps you to know you have options."