“I’m in a suit! This is big time for me!” That’s how Sean Donnelly opened his network TV debut last night on Late Show with David Letterman.

Just a month ago, Donnelly was one of the New Faces at Montreal’s Just For Laughs comedy festival. Of course, two other New Faces this summer also recently made their Letterman debuts (Adam Newman, Chris Distefano), so who woulda thunk Letterman would become once more the place for newcomers to make their big splashes!

For Donnelly’s set, he jokes about being the King of Old Navy, his Netflix viewing habits, his discussions with his mother, and the quality of sex he has with his wife.

Roll the clip!

You can see a more relaxed, casual Sean Donnelly talk with other comedians in his Official Comedy webseries, “One Question With Sean.”