Since the moment they met at age 5, Rosie and Alex have been best friends, facing the highs and lows of growing up side by side. A fleeting shared moment, one missed opportunity, and the decisions that follow send their lives in completely different directions. As each navigates the complexities of life, love, and everything in between, they always find their way back to each other - but is it just friendship, or something more?

Lily Collins
as Rosie Dunne

Sam Claflin
as Alex Stewart

Christian Cooke
as Greg

Tamsin Egerton
as Sally

Suki Waterhouse
as Bethany Williams

Jaime Winstone
as Ruby

Art Parkinson
as Gary Dunne

Jamie Beamish
as Phil

Lorcan Cranitch
as Dennis Dunne

Ger Ryan
as Alice Dunne
Reno
> You can't respect the friendship by denying the facts. Definitely a modern love story. The movie covers the story of the title character, Rosie's 12 years of life. From the night when she celebrates her 18th birthday till becomes the 30 year old mother. It's a long journey in the real life, and...