After his impetuous musician girlfriend, Samantha, dies in an accident shortly after they had a fight (and nearly broke up), a grief-stricken British businessman, Ian Wyndham, living in London gets a chance to relive the day all over again, in the hope of changing the events that led up to her getting killed.
Unfortunately the movie If Only is not yet available on HBO Max.
| Directing | Gil Junger | Director |
| Production | Jill Gilbert | Producer |
| Production | Jennifer Love Hewitt | Producer |
| Sound | Adrian Johnston | Original Music Composer |
| Camera | Giles Nuttgens | Director of Photography |
| Visual Effects | Brian Jennings | Visual Effects Supervisor |
| Production | Victoria Burrows | Casting Director |
| Costume & Make-Up | Odile Dicks-Mireaux | Costume Designer |
| Production | Gil Junger | Producer |
| Writing | Christina Welsh | Screenplay |
| Production | Rachel Neale | Unit Production Manager |
| Directing | Deborah Saban | First Assistant Director |
| Directing | Olivia Lloyd | Second Assistant Director |
| Production | Laurie Borg | Co-Producer |
| Crew | Jo McLaren | Stunts |
| Art | Les Benson | Props |
| Production | Moritz Borman | Executive Producer |
| Production | Jeffrey Graup | Co-Executive Producer |
| Production | Basil Iwanyk | Executive Producer |
| Production | Gub Neal | Executive Producer |
| Production | Robert F. Newmyer | Producer |
| Production | Jeffrey Silver | Producer |
| Production | Scott Strauss | Co-Producer |
| Editing | William M. Anderson | Editor |
| Editing | Padraic McKinley | Editor |
| Production | Priscilla John | Casting |
| Art | Joseph Bennett | Production Design |
| Art | Mark Raggett | Art Direction |
| Art | Rebecca du Pont de Bie | Set Decoration |
| Costume & Make-Up | Ameneh Mahloudji | Makeup & Hair |
| Costume & Make-Up | Elizabeth Yianni-Georgiou | Makeup & Hair |
| Sound | Mike Prestwood Smith | Sound Re-Recording Mixer |
| Sound | Ruth Sullivan | Foley Artist |
