Ben & Matt -- Not Like Family, They ARE Family

We all thought it, but it's actually true -- Ben Affleck and Matt Damon are related. How do you like them apples?

Ben Affleck, Matt Damon

The New England Historic Genealogical Society concluded the Oscar-winning man-friends are actually 10th cousins ... once removed, the Boston Herald reports. They share a common 10th great-grandfather, William Knowlton of Ipswich, a bricklayer who died in 1655.

It also turns out Ben is an 11th cousin to Barack Obama and Matt is related to "six or seven" presidents.

What a family gathering that would make.