Woody Harrelson confirms he and Matthew McConaughey will take DNA test to finally find out if they are brothers

Woody Harrelson has confirmed that he and Matthew McConaughey are probably going to do a DNA test to find out if they're brothers.

The pair, who have a pretty striking resemblance despite being apparently unrelated (as far as they know), have spoken about doing a DNA test before, after McConaughey explained that his mother had known Harrelson's father many years ago.

"In Greece a few years ago, we’re sitting around talking about how close we are and our families," the 54-year-old said on the Let’s Talk Off Camera with Kelly Ripa podcast.

"And my mom is there, and she says, 'Woody, I knew your dad'. Everyone was aware of the ellipses that my mom left after ‘knew’.

"It was a loaded K-N-E-W."

He also said: "And that’s part of our bromance, right? My kids call him Uncle Woody. His kids call me Uncle Matthew etc etc. And you see pictures of us and my family thinks a lot of pictures of him are me. His family thinks a lot of pictures of me are him."

Now, in a new interview, Harrelson has explained that the two actors are probably going to take the test once and for all to find out.

"Well, we haven't done the DNA test, but we're probably going to do that. I think there's a real possibility," he told Johnny Vaughan on Radio X.

The pair are probably going to do a DNA test (Gary Miller/Getty Images)

When asked whose parent was 'promiscuous', Harrelson added: “I think all of our parents! You know, actually, it came out of one time Matthew’s mom, who called Mom-Mack, was just an incredible lady, but very devious. You never know what's true, what's not true. One time she said to me, after I'd known it for 25 years, she said, ‘I knew your father,’ and I found the ellipses troubling.

“Yeah, it sounds like something went on. And the thing was Matthew's mom and dad divorced. They were married three times.

"Yeah. So, they'd split for a while, and during one of those splits, Charles Harrelson just seemed to find a little favour with her.”

The pair are already close friends (Jeff Kravitz/FilmMagic)

Of course, if they did find out they were brothers, it would probably be a life changing discovery, especially for McConaughey.

"Look, it’s a little easier for Woody to say, ‘Come on, let’s do [DNA tests],’ because what’s the skin in it for him?” he explained on the Let's Talk Off Camera podcast.

"It’s a little harder for me because he’s asking me to take a chance to go, 'Wait a minute, you’re trying to tell me my dad may not be my dad after 53 years of believing that?' I got a little more skin in the game."