Annie (Kristen Wiig – MacGruber) and Lillian (Maya Rudolph – Grown Ups) are best friends. When Lillian announces she is getting married, Annie is over the moon and is delighted to be her maid of honour. It’s a coveted role as Lillian’s other friend Helen (Rose Byrne – X-Men: First Class) looks to be a perfect candidate to organise everything. Despite her life being in a mess, Annie is determined to show Lillian and the rest of the girls a good time - even if she is ill-equipped to deal with all the ensuing chaos.