Woody Harrelson wants Matthew McConaughey to take a DNA test to find out if they're brothers: 'You're gaining a father and a brother'

• Woody Harrelson said Matthew McConaughey should do a DNA test to find out if they're brothers.
• McConaughey recently revealed his mother "knew" Harrelson's father during a break in her marriage.
• Harrelson pointed out that McConaughey could be "gaining" a father and a brother.

Woody Harrelson and Matthew McConaughey are two of the most well-known actors of the last few decades, and have both been nominated for a variety of awards including the Oscars, with McConaughey actually winning best actor in 2014 for "Dallas Buyers Club."

But it seems that talent could run in the family after McConaughey revealed last week that he and Harrelson might be brothers. The actor said that his mother "knew" Harrelson's father during a time when she was separated from her husband. 

Harrelson also discussed the surprising revelation on Tuesday's "The Late Show with Stephen Colbert."

Harrelson added further context to McConaughey's story, explaining: "Well, I'll just say there is some veracity to that thought because we talked to Ma' Mac, Matthew's legitimate mother, and she let us know one time… I mean, this is crazy. We were in Greece watching the US team win the World Cup and I don't know, I mentioned something about regrets." 

The "True Detective" and "White House Plumbers" star added: "And I said, 'You know, it's odd that my father has no regrets.' And I have known Ma' Mac a long time, and she goes, 'I knew… your father.' And it was the ellipses I found a little troubling, or interesting. 'I knew your father.'"

Harrelson described the pause as "filled with innuendo," and said that the timing of their parents' rendezvous was around the time McConaughey was conceived.

"The year of his birth, nine months before, she was on a sabbatical from her relationship with his supposed father, Jim," Harrelson said.

The actor went on to say that McConaughey isn't keen on the idea of a DNA test but said that his friend could gain more family members as a result of it. 

"We want to go for a test, but for him, it's a much more big deal. I mean he feels like he is losing a father. But I'm like, no, you're gaining a different father and a brother," Harrelson said.

This isn't the first time Harrelson has been in the news lately, as he was met with criticism in February when he joked about a pandemic conspiracy during his monologue on "Saturday Night Live."