Martin Sheen, Charlie Sheen and Emilio Estevez

Next up is Carlos Irwin Estevez! Never heard of him? You'll know him better by his stage name: Charlie Sheen. Young Charlie followed the lead of his father, Martin Sheen, who changed his name when he launched his showbiz career. West Wing star Martin was actually born Ramon Antonio Gerard Estevez.

Charlie's brother Emilio Estevez kept his birth name and had huge success in the 1980s with classics such as The Breakfast Club and Young Guns, but these days he concentrates his efforts behind the camera.