Leary and O’Brien both got their start in comedy, as a stand-up comedian and 'Saturday Night Live' writer, respectively.

“We look like two Irish aunts,” Leary joked after Fallon brought out a side-by-side photo of the two stars, who are third cousins. “We look like sisters, that’s what we look like. Two old sisters.” ...

Comedian and actor Denis Leary came up around the same time as O’Brien, even appearing as a guest on Late Night with Conan ...

It was Denis Leary's uncle who put together the pieces of the family puzzle and explained how the actor was related to Conan ...

Leary also shares a hilarious story about reuniting with his many Irish cousins while filming in Ireland as well as what his 97-year-old mother thought of the show! IE 11 is not supported.

Denis Leary has said that "ten different Irish cousins" would turn up every day on set when he was filming his new TV series Going Dutch in Ireland. Speaking on US talkshow Today with Jenna and ...

The cast of Going Dutch led by Denis Leary, Danny Pudi ... Quinn in the series admits he has a bit of a soft spot for Irish cheese. “I will say this — and I know I’m prejudiced because ...

Denis Leary reveals how he figured out his connection to revered TV host Conan O'Brien, who turned out to be distant cousins.