Shailene Woodley

Hazel Grace Lancaster

Ansel Elgort

Augustus Waters

Nat Wolff

Isaac

Laura Dern

Frannie Lancaster

Sam Trammell

Michael Lancaster

Willem Dafoe

Peter van Houten

Lotte Verbeek

Lidewij Vliegenthart

Ana Dela Cruz

Dr. Maria

Randy Kovitz

Dr. Simmons

Toni Saladna

Flight Attendant

David Whalen

Gus' Dad

Milica Govich

Gus' Mom

Allegra Carpenter

Hostess

Emily Peachey

Monica

Emily Bach

Monica's Mom

Tim Hartman

Minister

Mike Birbiglia

Patrick

Jean Brassard

Waiter

Carly Otte

Young Girl (Alisa)

Silvio Wolf Busch

European

Carol Weyers

Anne Frank (voice)

John Green

Little Girl's Father (uncredited)