Emma Roberts as Poppy Moore

Alex Pettyfer as Freddie Kingsley

Natasha Richardson as Mrs. Kingsley

Kimberley Nixon as Kate

Juno Temple as Jennifer 'Drippy' Logan

Johnny Pacar as Roddy

Linzey Cocker as Josie

Aidan Quinn as Gerry Moore

Georgia King as Harriet Bentley

Sophie Wu as Kiki

Lexi Ainsworth as Molly Moore

Shelby Young as Ruby

Shirley Henderson as Matron

Nick Frost as Mr. Christopher

Selina Cadell as Mrs. Loughton

Daisy Donovan as Miss Rees-Withers

Ruby Thomas as Jane

Jason Watkins as Mr. Nellist

Eleanor Turner-Moss as Charlotte

Maisie Preston as 'Wow' Girl

Tommy Kijas as Jake

Sonia Rockwell as Lola

Kelsey Sanders as Skye

Katelyn Pacitto as Twin #1

Kara Pacitto as Twin #2

Vanessa Branch as Rosemary

Hallie Eisenberg as Ruthie

Nick Frost as Mr. Kingsley