Colin Farrell

David

Margot Robbie

Sarah

Kevin Kline

The Mechanic

Phoebe Waller-Bridge

Female Cashier

Lily Rabe

Sarah's Mother

Hamish Linklater

David's Father

Jodie Turner-Smith

GPS (voice)

Chloe East

Cheryl

Jennifer Grant

David's Mother

Billy Magnussen

The Man

Sarah Gadon

The Woman

Jason Kravits

Mr. Nelson

Brandon Perea

Mike

Jacqueline Novak

Stacy Dunn

Lucy Thomas

Amanda

Mike Meldman

Father of the Bride

Calahan Skogman

Sarah's Groomsman

Pablo Soriano

Vincent

Galen Hooks

Choreographer

Michelle Mao

Smitty

Shelby Simmons

Stage Manager

Simon Khan

Tate Chandler

Brooke Maroon

Amy Moore

Julian Zane

Eddie Bora

Liz Jenkins

Another Mother

Gabriella Surodjawan

Miss Jones

Joyce Guy

Doctor Vernon

Karah Donovan

Nurse

Mia-Carina Mollicone

Hotel Receptionist

Yuvi Hecht

Young David

Aaron Quini

Student Performer

Carissa Rae Martin

Student Performer

Jarvis Langster

Student Performer

John Arthur Mays

Student Performer

Kayla LaVine

Student Performer

Mariah Spears

Student Performer

Phi VoBa

Student Performer