Caitlyn Jenner then and now
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Credit: Getty Images for Life is Good / Rich Polk
Caitlyn Jenner attends the Life is Good at Gold Meets Golden Event at Equinox on in Los Angeles on Jan. 7, 2017.
Credit: Getty Images / Jamie McCarthy
From left, Madeline Albright, Caitlyn Jenner and Judith Light attend the 2015 Glamour Women of The Year Awards dinner hosted by Cindi Leive at The Rainbow Room in Manhattan on Monday, Nov. 9, 2015.
Credit: Getty Images / Jamie McCarthy
Honorees Reese Witherspoon, left, and Caitlyn Jenner attend the 2015 Glamour Women of The Year Awards dinner hosted by Cindi Leive at The Rainbow Room in Manhattan on Monday, Nov. 9, 2015.
Credit: Getty Images / Nicholas Hunt
Caitlyn Jenner, left, and Kylie Jenner backstage at the 2015 Glamour Women of The Year Awards dinner hosted by Cindi Leive at The Rainbow Room in Manhattan on Monday, Nov. 9, 2015.
Credit: Getty Images / Larry Busacca
Caitlyn Jenner at the 2015 Glamour Women of The Year Awards dinner hosted by Cindi Leive at The Rainbow Room in Manhattan on Monday, Nov. 9, 2015.
Credit: Getty Images / Kevin Winter
Honoree Caitlyn Jenner accepts the Arthur Ashe Courage Award onstage during The 2015 ESPYS at Microsoft Theater on July 15, 2015 in Los Angeles.
Credit: Getty Images / Kevin Winter
Honoree Caitlyn Jenner accepts the Arthur Ashe Courage Award onstage during The 2015 ESPYS at Microsoft Theater on July 15, 2015 in Los Angeles.
Credit: Getty Images / Kevin Winter
Honoree Caitlyn Jenner accepts the Arthur Ashe Courage Award onstage during The 2015 ESPYS at Microsoft Theater on July 15, 2015 in Los Angeles.
Credit: Getty Images
Bruce Jenner, a native of Mount Kisco, N.Y., celebrates his record-setting performance in the decathlon at the 1976 Summer Olympics in Montreal.
Credit: Getty Images
Bruce Jenner and his son-in-law, NBA player Lamar Odom, arrive at the 2012 ESPY Awards on July 11, 2012.
Credit: Getty Images for Michael Jordan / Ethan Miller
Bruce Jenner attends the 13th annual Michael Jordan Celebrity Invitational gala at the ARIA Resort & Casino at CityCenter in Las Vegas on April 4, 2014.
Credit: Getty Images / Gabriel Olsen
Bruce Jenner arrives for Ryan Sheckler's 7th annual Celebrity Golf Tournament at Trump National Golf Course in Palos Verdes Estates, California, on Sept. 29, 2014.