Nathan Fillion has dated some famous women over the course of his lifetime, and he's even been engaged twice.

Sadly, those romances weren't meant to be, and The Rookiestar is now single, but that doesn't mean his relationships ended on bad terms. In fact, the John Nolan actor made a surprising admission about his exes, who include actresses Vanessa Marcil and Mikaela Hoover, during an interview in 2010.