 | Shailene Woodley als Hazel Grace Lancaster |
 | Ansel Elgort als Augustus Waters |
 | Nat Wolff als Isaac |
 | Laura Dern als Frannie Lancaster |
 | Sam Trammell als Michael Lancaster |
 | Willem Dafoe als Peter van Houten |
 | Lotte Verbeek als Lidewij Vliegenthart |
 | Mike Birbiglia als Patrick |
 | Ana Dela Cruz als Dr. Maria |
 | Randy Kovitz als Dr. Simmons |
 | Emily Peachey als Monica |
 | David Whalen als Gus' Dad |
 | Milica Govich als Gus' Mom |
 | Allegra Carpenter als Hostess |
 | Toni Saladna als Flight Attendant |
 | Emily Bach als Monica's Mom |
| Tim Hartman als Minister |
| Bethany Leo als Speaker #1 (Beth) |
| Alexis Hodges als Speaker #2 (Angel) |
 | Jean Brassard als Waiter |
| Carly Otte als Young Girl (Alisa) |
| Lily Kenna als Young Hazel |
 | Silvio Wolf Busch als European |
| Viviana Cardenas als Support Group Member (Julie) |
| Jordan Drexel als Speaker #3 (Sid) |
| PJ Rossotto als Speaker #4 (PJ) |
| Tanner Boatwright als Gus's Leg Double |
| Cheyenne Hurley als Coffee Shop Worker |
| Jennifer Kline als Giggling Girl |
| Carol Weyers als Anne Frank (voice) |
| Lauren Blumenthal als Support Group |
| Nikki Lipinski als Support Group |
| Sebastian Dean als Support Group |
| Alexander Murph als Support Group |
| Taylor Dettore als Support Group |
| Josh Potter als Support Group |
| Steven Edmonds als Support Group |
| Cindy Zeng als Support Group |
| C.J. Evans als Support Group |
 | Daniel Booko als Voice Cast |
 | Jacqueline Pinol als Voice Cast |
 | Sitara Attaie als Voice Cast |
 | Jim Pirri als Voice Cast |
 | Jean Gilpin als Voice Cast |
 | Joey Richter als Voice Cast |
 | Nicholas Guest als Voice Cast |
 | Danielle Hartnett als Voice Cast |
 | Matthew Wolf als Voice Cast |
 | Dina Morrone als Voice Cast |
 | Joe Fishel als Dog Walker |
| Richard C. Fishel als Dog in Park |
| Gregory A. Weimerskirch | Art Direction |
| John Green | Novel |
| Marty Bowen | Producer |
| Robb Sullivan | Editor |
| Josh Boone | Director |
| Molly Hughes | Production Design |
| Michael H. Weber | Screenplay |
| Scott Neustadter | Screenplay |
| Wyck Godfrey | Producer |
| Ben Richardson | Director of Photography |
| Jim Brookshire | Sound Editor |
| Mary Claire Hannan | Costume Design |
| Paul Apted | Sound Editor |
| Jenn Albaugh | Art Department Coordinator |
| Diane Collins | Costume Supervisor |
| Season Kent | Music Supervisor |
| Menno Westendorp | Camera Operator |
| Erno Das | Gaffer |
| David A. Dwyer | Rigging Grip |
| Tom Denier Jr. | Makeup Effects |
| Merissa Lombardo | Set Decoration |
| Chris Muchow | Rigging Gaffer |
| Jim Bridges | Still Photographer |
| Jason Trosky | Special Effects Coordinator |
| Leendert van Nimwegen | Key Hair Stylist |
| Alette Kraan | Costume Supervisor |
| Jake Braver | Visual Effects Supervisor |
| Andy Nelson | Sound Re-Recording Mixer |
| Steve Cohagan | Gaffer |
| Brice Liesveld | Visual Effects Producer |
| Geri Mataya | Key Hair Stylist |
| Andrea Atwater | Visual Effects Coordinator |
| James Pastorius | Visual Effects Supervisor |
| Nancy Keslar | Hair Department Head |
| Dante Ludovici | Camera Operator |
| Raymond M. Tasillo | Special Effects Supervisor |
| Rebecca Dunn | Visual Effects Producer |
| Greg Borkman | First Assistant Editor |
| John S. Moyer | Steadicam Operator |
| Vincent Schicchi | Makeup Effects |
| James Eidel | Set Costumer |
| Ariela Rotenberg | Visual Effects Producer |
| John Bair | Visual Effects Supervisor |
| Buster Pile | Construction Coordinator |
| Howard Karp | Sound Re-Recording Mixer |
| Hannah d'Angerio | Casting Associate |
| Laura Zech | Casting Associate |
| Erwan van Buuren | Steadicam Operator |
| Nancy Fuller | Digital Intermediate |
| Donna M. Belajac | Casting |
| Ramon Engle | Steadicam Operator |
| Doug Fairall | Makeup Artist |
| Ronna Kress | Casting |
| Donald Sylvester | Supervising Sound Editor |
| Marianne Skiba | Makeup Department Head |
| Luca Kouimelis | Script Supervisor |
| Greg Borkman | Visual Effects Editor |
| Skip Kimball | Digital Intermediate |
| Michele Imperato Stabile | Executive Producer |
| H.H. Cooper | First Assistant Director |
| Kristen Ploucha | Second Assistant Director |
| Stefanie Hamann | Second Assistant Director |
| Dan Short | Second Second Assistant Director |
| Lodewijk van Lelyveld | Third Assistant Director |
| Cora Aarnoutse | Crowd Assistant Director |
| Ryan White | Executive Producer |
| Nate Walcott | Original Music Composer |
| Mike Mogis | Original Music Composer |
| Sandra Fox | Foley Artist |
| Goro Koyama | Foley Artist |
| Andy Malcolm | Foley Artist |
| Lois Yaroshefsky | Studio Teacher |
