Haley Lu Richardson
Hadley Sullivan

Ben Hardy
Oliver Jones

Rob Delaney
Andrew Sullivan

Katrina Nare
Charlotte

Jameela Jamil
Narrator (voice)

Tom Taylor
Luther Jones

Dexter Fletcher
Val Jones

Sally Phillips
Tess Jones

Vivian Gwaspari
Headphones Girl

Tracy Wiles
Mrs. O'Callaghan

Ibinabo Jack
Bridesmaid Shanti

Jessica Ransom
Bridesmaid Bertie

Doña Croll
Hat Lady Elizabeth

Kerry Howard
Maid of Honour Violet

Anthony Warren
Heathrow Taxi Driver

Andromeda Godfrey
Cate Sullivan

David Rubin
Dr. Doyle

George Keeler
Flower Vendor

Emily Cordell
Teen Girl

David Langham
UK Border Officer

Angus Kennedy
Thicker

Jayda Eyles
Young Hadley