James D'Arcy as Eric Zimit

Sophie Lowe as Petra

Rhys Wakefield as James

Bonnie Wright as Georgina

Daryl Sabara as Chips

Abhi Sinha as Kavi

Freddie Stroma as Jack

Katie Findlay as Bonnie

George Blagden as Andy

Jacob Artist as Parker

Erin Moriarty as Vivian

Maia Mitchell as Beatrice

Philippa Coulthard as Poppie

Toby Sebastian as Russell

Hope Olaidé Wilson as Omosedé

Melissa Le-Vu as Plum

Darius Homayoun as Toby

Chanelle Bianca Ho as Mitzi

Taser Hassan as Nelson

Natasha Gott as Yoshiko

Asger Mariager as Young James (Age 7)

James Moriarty as Young James (Age 12)

Chamroeun Bustraan as Young James (Age 16)

Julia Hodges as Best Friend on Tower

Katherine Robertson as Best Friend on Tower

Kory Brown as Student on Trolley Tracks

Jack Hooker as Student on Trolley Tracks

Piper Hinson as Student on Trolley Tracks

Melissa Kaskel as Student on Trolley Tracks

Michael Rougeau as Student on Trolley Tracks

Endang Pratiwi as Street Vendor (voice)

Cinta Laura Kiehl as Utami