Chris Pratt has effectively won over just about everyone who’s ever watched him in anything; not only is he the adorably clueless Andy on Parks And Recreation, he voiced Emmet in The Lego Movie and is killing it at the box office with Guardians Of The Galaxy. He’s one of those actors you can’t help but love, due in part to his continued regular-Joe attitude no matter how big his star gets. But there’s also his sense of humor, which can sometimes get him into trouble.

Pratt talked to Seth Meyers at Late Night recently about how he surprised Amy Poehler with a pantsless scene when he was supposed to be wearing nude-colored underwear, and how it got him in hot water with the NBC execs.

“Andy was still dating Ann, or had been dating Ann and was like still in love with Ann, and she wanted him to come to the house. He got the signals crossed somehow and thought that she wanted him to come to the house naked and hook up. So I show up naked at the house. Leslie is there—Amy Poehler is there—to receive a naked Andy….I went trou-down and the reaction was awesome. It’s the one they used.”

Poehler, who got her start with improv group The Second City, took the prank like a champ, but Pratt said his bosses at NBC sent him a note saying his stunt was not okay.

Pratt, who is married to actress Anna Faris, showed he was more than a practical joker recently when he spoke about their son Jack, who was born premature. The actor said the trying situation helped him get in touch with his spiritual side.

“We were scared for a long time. We prayed a lot,. It restored my faith in God, not that it needed to be restored, but it really redefined it. The baby was so beautiful to us, and I look back at the photos of him and it must have been jarring for other people to come in and see him, but to us he was so beautiful and perfect,” he said.

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