Hollywood usually ignores the rules of genetics when it comes to casting family members in movies. Even some of our favorite films of all time, from "The Godfather" to "The Royal Tenenbaums" feature relatives that no combination of chromosomes could have realistically created. But every once in a while, the showbiz powers that be strike casting gold with actors who resemble each other enough to believably share a last name.
Here are 12 pairs of co-stars who you'd swear could be related. Get More »