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.
| Production | Jennifer Love Hewitt | Producer |
| Production | Jill Gilbert | Producer |
| Directing | Gil Junger | Director |
| Camera | Giles Nuttgens | Director of Photography |
| Sound | Adrian Johnston | Original Music Composer |
| Production | Laurie Borg | Co-Producer |
| Art | Les Benson | Props |
| Production | Jeffrey Graup | Co-Executive Producer |
| Production | Jeffrey Silver | Producer |
| Costume & Make-Up | Elizabeth Yianni-Georgiou | Makeup & Hair |
| Production | Moritz Borman | Executive Producer |
| Art | Joseph Bennett | Production Design |
| Art | Rebecca du Pont de Bie | Set Decoration |
| Production | Gub Neal | Executive Producer |
| Production | Scott Strauss | Co-Producer |
| Editing | William M. Anderson | Editor |
| Production | Basil Iwanyk | Executive Producer |
| Production | Robert F. Newmyer | Producer |
| Production | Priscilla John | Casting |
| Art | Mark Raggett | Art Direction |
| Editing | Padraic McKinley | Editor |
| Costume & Make-Up | Ameneh Mahloudji | Makeup & Hair |
| 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 |
| Crew | Jo McLaren | Stunts |
