The film, which stars Rafe Spall and Rose Byrne, has been written and directed by Borat writer Dan Mazer.
I Give It A Year follows a pair of newlyweds (Spall and Byrne) as they struggle with their first year of marriage. The couple deal with temptation in the shape of an old flame and an attractive American work client.
The preview begins with Stephen Merchant delivering the cringe-inducing best man speech at the couple's wedding. The film also stars Anna Faris playing an old flame and Simon Baker as a sexy client.
Peep Show's Olivia Colman plays a kooky marriage counsellor, and Minnie Driver appears as an outspoken friend of the pair.
I Give It A Year will be in UK cinemas on February 8.