Jeremy of The Daily Rotation wrote, "It’s been awhile since I’ve seen a movie as dumb and weird as Our Idiot Brother. Its humor is closest to Napoleon Dynamite, but with a lot more charm. Dynamite sort of came of as weird and random, but Our Idiot Brother comes off as more of a dumb and charming little film. Its intentions are good and it’s enjoyable. The main thing is getting over how dumb it is. Every bit of dialogue is delivered with an easy, laid back attitude. The word dude is thrown around a lot and if you’re okay with that then I think you might find something in Our Idiot Brother. It’s a light, sweet and charming film that works mainly because of Paul Rudd."