Ever wondered how many famous people named Rex there are? This list of celebrities named Rex includes photos and information about each person when available. The famous Rexs on this list come in all shapes and sizes, but all ended up achieving some kind of fame in their respective fields. This includes singers and musicians named Rex, actors named Rex, and even athletes named Rex. Well-known Rexs like Rex Harrison, Rex Ryan, and Rex Grossman are just the start of this list.