Very few celebrities in Hollywood can brag about being an EGOT winner.Achieving an Emmy, a Grammy, an Oscar, and a Tony (EGOT) is a feat so difficult that only 21 stars have earned it. Among them are Rita Moreno, Whoopi Goldberg, Audrey Hepburn, Elton John, and John Legend. There's also one person, Robert Lopez, who is a double EGOT winner and the youngest celebrity ever to win all four awards at 39 years old.Here's the full list of every EGOT winner.Palmer Haasch contributed to an earlier version of this story.