05/06/2015 12:29 pm ET Updated Dec 06, 2017

Chris O'Dowd Is Playing A Hilarious, Elaborate Prank On His Baby

Chris O'Dowd's newborn son Art is only 15-weeks-old, but the Irish actor and comedian thinks it's never too early to get him involved in pranks.

"I've started playing a really great long-form joke on him," O'Dowd said during his May 5 appearance on "Conan." "I haven't told my wife," he added guiltily.

The "Bridesmaids" actor said that when he brings Art to the park in the morning and notices other families spending time there, he asks them to hold his baby and takes a picture of them together.

"I'm gonna get the photos developed and I'm gonna put them in a frame behind another picture and when he's around 14 or 15, he'll be like, 'Oh, I need a frame.' And I'll be like, 'Oh, just take one of the frames from upstairs.' And then he'll pull out the photo and think he belonged to another family."

Remind us to check in after 15 years to see how the prank went down.

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