Caitlyn Marie Jenner (born William Bruce Jenner; October 28, 1949) is an American television personality and retired Olympic gold medal-winning decathlete. Assigned male at birth, Caitlyn Jenner publicly came out as a trans woman in April 2015. Her new name was publicly announced in July of that year, with her name and gender being legally changed the following September. From 2015 to 2016, Jenner starred in the reality television series I Am Cait, which focused on her gender transition. In January 2017, she underwent sex reassignment surgery. Jenner has been called the most famous transgender woman in the world.