While trying to make his sister's wedding day go smoothly, Jack finds himself juggling an angry ex-girlfriend, an uninvited guest with a secret, a misplaced sleep sedative, and the girl that got away in alternate versions of the same day.
Sam Claflin
as Jack
Olivia Munn
as Dina
Eleanor Tomlinson
as Hayley
Freida Pinto
as Amanda
Joel Fry
as Bryan
Jack Farthing
as Marc
Allan Mustafa
as Chaz
Tim Key
as Sidney
Aisling Bea
as Rebecca
Paolo Mazzarelli
as Vitelli
Tiziano Caputo
as Roberto
Simonetta Solder
as Sophia
