Rose Byrne as Annie Platt

Ethan Hawke as Tucker Crowe

Chris O'Dowd as Duncan Thomson

Azhy Robertson as Jackson

Lily Brazier as Ros Platt

Megan Dodds as Carrie

Ayoola Smart as Lizzie

Enzo Cilenti as Barnesy

Pamela Lyne as Edna

Denise Gough as Gina

Phil Davis as Mayor Terry Barton

Kitty O'Beirne as Co-Worker

Alex Clatworthy as Katie

Ko Iwagami as Chatmate Ko

Lily Newmark as Carly

Eleanor Matsuura as Cat

Daniel Shaw as Jim (Cat's Date)

Frank Owen as Taxi Driver

Florence Keith-Roach as Caroline

Mage Rodrigo as Patient

Fehinti Balogun as Fehinti

Thomas Gray as Zak

Brodie Petrie as Jesse

Cal Petrie as Cooper

Nina Sosanya as Natalie

Matt King as Mark

Carol Anderson as Train Conductor

Georgina Bevan as Young Julie

Anabella Galbally as Baby Grace

Florence Galbally as Baby Grace

Emma Paetz as Grace (voice)

Toby Grimes as Kissing Couple

Yeliz Simsek as Kissing Couple

Terry Sach as Jukebox Man

Ninette Finch as Old Couple

Douglas Singer as Old Couple

Ronnie Evans as Museum Kid

Samuel Saphir as Museum Kid

Florence Stephenson as Museum Kid

Charlotte Bottomley as Museum Kid

Paul Jackson as Bartender

Lee Byford as Shopper (uncredited)

Laura Camberley as Commuter (uncredited)

Michael Chapman as Deck Chair Man (uncredited)

Andrew Dunkelberger as Pedestrian / Diner (uncredited)

Sascha Panknin as Faculty Staff (uncredited)

Mike Pinfield as Pub Customer (uncredited)

Johanna Thea as Rosie / Junior Doctor (uncredited)

Jimmy O. Yang as Elliot (uncredited)

Steve Barnett as American Driver (uncredited)