Matthew McConaughey says Woody Harrelson might be his brother after a confession from his mom.

Matthew McConaughey and Woody Harrelson are famous actors who have been in the spotlight for many years. They’ve been close friends and even starred together in the popular show “True Detective” in 2014, where their on-screen chemistry felt like a brotherly bond.

It turns out, their connection might be deeper than just friendship. Could their realistic performances have been influenced by a truth they didn’t know at the time?

According to McConaughey, he and Woody Harrelson might actually be real brothers. Not just close friends or like brothers, but actual brothers by blood.

According to Metro, McConaughey says he and Harrelson might be siblings. His mom revealed something that makes this hard to ignore.

McConaughey, who is 53 and starred in “Dallas Buyers Club,” said his mom hinted she knew Harrelson’s father well, suggesting they might have had a close relationship in the past.

McConaughey shared on Kelly Ripa’s Let’s Talk Off Camera podcast that his mom dropped this surprising news while his and Harrelson’s families were on vacation in Greece together.

The Interstellar actor shared that one day they were talking about how people often confuse him and Harrelson in photos.

“A few years ago in Greece, we were sitting around talking about how close we are and our families,” McConaughey said.

“My mom was there and she said, ‘Woody, I knew your dad.’ Everyone noticed the pause after ‘knew.’ It was a loaded K-N-E-W.”

After hearing this, McConaughey decided to investigate his family history. He found out that while his parents were going through their second divorce, Harrelson’s father was on furlough.

Harrelson, who is 63, suggested they get DNA tests, but McConaughey isn’t sure.

McConaughey said, “It’s easier for Woody to say, ‘Let’s do DNA tests,’ because he doesn’t have much to lose. For me, it’s harder because it might mean that my dad isn’t really my dad after believing that for 53 years. I have more at stake.”

Harrelson’s father was sentenced to 15 years in prison in 1973 for murdering a grain dealer, which Harrelson learned about from a radio broadcast.

The Hunger Games star told The Guardian: “I was waiting in the car for someone to pick me up from school. I was listening to the radio, and they were talking about a trial involving someone named Charles V Harrelson for murder. I thought, ‘There can’t be another Charles V Harrelson. That’s my dad!’”