"We're friends. We've always been friends," said Thornton, whose new memoir, "The Billy Bob Tapes: A Cave Full of Ghosts," includes a foreward written by Jolie. "See, in the press, ladies and gentleman, if you get a divorce, everyone assumes that it was nasty, and it's just not always."
"It's not that I haven't had a couple of nasty ones, you know, but this was not one of them," joked the actor, who has been married five times. "Angie and I are great friends, we always have been, and we talk on a pretty regular basis."
In an interview with ABC's "Nightline" last week, the Oscar-winning actor admitted that he "blew it" with Jolie -- who's currently engaged to Brad Pitt -- because he didn't think he was "good enough for her."
Since 2003, Thornton has been in a relationship with make-up artist Connie Angland, with whom he had a daughter.
Click through the slideshow below for other celebrity exes who remained friends post-split.
EARLIER ON HUFFPOST:
HuffPost Lifestyle is a daily newsletter that will make you happier and healthier — one email at a time. Learn more