WATCH: Chris O’Dowd is playing a longform prank on his baby son

The hilarious yet cruel prank involves a picnic, strangers and gypsy scarfs but we’ll let Chris explain.

Chris O'Dowd has revealed that he has began to play a longform prank on his 15-week-old baby son, Art.

Roscommon native Chris O’Dowd appeared on American chat show Conan last night where he discussed all things parenting.

Chris, who is married to comedian Dawn Porter, admitted that she doesn't know anything about the prank but Conan convinces him since they don't have cable she'll never find out.

The hilarious prank involves Chris taking pictures of Art wearing gypsy scarfs at a picnic with strangers and ends with Art as a 14- year-old boy looking for a frame - but we’ll let Chris explain.

We know one thing, we wouldn't like to be around when Art uncovers the truth but you have to respect Chris' efforts.

And the award for father of the year goes to …