Caitlyn Jenner

Caitlyn Jenner just might be the most surprising transition on this list. While some of the other celebrities had minor physical changes, this last decade came with a new name and gender for Caitlyn Jenner. In 2010, the now female celebrity went by the name Bruce Jenner. For the first half of the 2010s, Bruce Jenner was the father of Kylie and Kendall Jenner.

In 2015, however, Kylie and Kendall gained another mother, when Bruce publicly became a transgender woman. She later starred in the reality television series, I Am Cait, which shed some light into her life, her transition, and what she is doing now as a woman. She has been referred to by some as the most famous transgender woman in history.