Since pretty much forever, celebrities have changed their names to something else. Maybe its alliteration, or they don't think their given name is suitable. But some of their new names aren't even close to the originals!

Check out what a few celebs' real names are!

Demi Moore = Demetria Guynes
Jennifer Aniston = Jennifer Anastassakis
Vin Diesel = Mark Sinclair Vincent
Joan Rivers = Joan Molinsky
Olivia Wilde = Olivia Cockburn
Tom Cruise - Thomas Mapother IV