Mike and Dave are two brothers who can't help but compete with one another. They're best friends and do everything together, but when it comes to playing a lifelong game of one-upmanship they're both in it to win it. When their sister announces that she's marrying her partner in Hawaii, Mike & Dave's mum and dad are instantly horrified by the possible antics their sons could get up to.
In a bid to calm their potential actions, it's suggested to the boys that they both bring a respectable date to the wedding. Someone they can present to their families and show a completely different - and more mature - side to their personality.
Alice and Tatiana are two girls who could actually rival the brothers and any of their past behaviour, who see Mike & Dave on TV talking about their search for a partner and decide that they're just the girls to accompany the boys to the island wedding. Their plan is successful but Mike and Dave soon figure out that there's more to the girls than they first thought.
Starring: Zac Efron, Adam DeVine, Anna Kendrick, Aubrey Plaza, Stephen Root, Wendy Williams, Sugar Lyn Beard, Mary Holland, Branscombe Richmond, Stephanie Faracy, Alice Wetterlund, Sam Richardson, Gina Evangelisti, Olga Kalashnikova