4. Frankie Muniz
Everyone knew the name Frankie Muniz back in the 90s when he appeared on shows like Malcolm In The Middle and starred in many films such as Agent Cody Banks. Muniz even received two Golden Globe nominations and an Emmy nomination for his role on Malcolm In The Middle. He had developed another passion, however, which he kept a secret for years.
Muniz announced that he would be taking a hiatus from acting to focus on his other great passion. Being a racecar driver. Turns out that he is a very skilled racing driver and even competed in the 2012 Atlantic Championship. Sadly, it recently came to light that Muniz was suffering severe memory loss after a serious accident.