Too-cute couple Sadie (Mandy Moore) and Ben (John Krasinski, from the US version of The Office) are heading for the altar. But before they can get there they must run the gauntlet of unorthodox priest Robin Williams’ marriage crash course. Cue screechy, spew-laden robo-babies, nerve-rattling argument practice and voyeuristic surveillance designed to head off any pre-nuptial sexcapades. Ken Kwapis’ comedy ploughs a well-tended furrow, from the hard truths our lovebirds discover to Williams’ family-friendly schtick. Krasinski ropes in a few Office mates for cameos, but there aren’t enough laughs or sparks to warrant saying, “I do!” at the box office.