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

Bethany Leo

Speaker #1 (Beth)

Alexis Hodges

Speaker #2 (Angel)

Jean Brassard

Waiter

Carly Otte

Young Girl (Alisa)

Lily Kenna

Young Hazel

Silvio Wolf Busch

European

Viviana Cardenas

Support Group Member (Julie)

Jordan Drexel

Speaker #3 (Sid)

P.J. Rosotto

Speaker #4 (PJ)

Tanner Boatwright

Gus's Leg Double

Cheyenne Hurley

Coffee Shop Worker

Jennifer Kline

Giggling Girl

Carol Weyers

Anne Frank (voice)

Lauren Blumenthal

Support Group

Nikki Lipinski

Support Group

Sebastian Dean

Support Group

Alexander Murph

Support Group

Taylor Dettore

Support Group

Josh Potter

Support Group

Steven Edmonds

Support Group

Cindy Zeng

Support Group

C.J. Evans

Support Group

John Green

Little Girl's Father (uncredited)