The omens aren't good from the start when Josh's best man Danny (the hilarious Stephen Merchant) does his best to destroy the marriage in his reception speech.
And it does go downhill from there for Nat and Josh.
Although the couple aren't prepared to give up on their marriage, matters are complicated by the arrival of two people they would much rather spend their lives with.
Chloe (a remarkably plain-looking Anna Faris) was Josh's girlfriend before she left to fulfil her humanitarian ideals in Africa.
Nat is torn when she meets a new client, Guy (Simon Baker) - and is swept away by his smooth demeanour and charm.
Be warned - every time Danny features, you know you are set for plenty of inappropriate humour.
I Give It A Year will keep you laughing and it's great value for a night with a DVD.
I Give It A Year
(R16) Hopscotch
Rating: 4 / 5