Article continues below advertisementRobin Williams is widely regarded as one of the funniest comedians of all time, but Mrs. Doubtfire costar Sally Field shockingly didn't see the humor in his jokes.The actress recalled working together during the Wednesday, May 6, episode of The Late Show With Stephen Colbert.Article continues below advertisement'It Just Wasn't Funny'Tap Here To Add Ok Magazine as A Trusted SourceSource: @colbertlateshow/youtubeSally Field called late 'Mrs. Doubtfire' costar Robin Williams 'unfunny.