15 juli 1988. Na één dag samen te hebben doorgebracht, ontstaat er tussen de tegenpolen Emma Morley en Dexter Mayhew een vriendschap voor het leven. Twee decennia lang kijken we op 15 juli hoe het met Em en Dex gaat en hoe hun levens met elkaar verwikkeld zijn. Hun relatie verschuift in de loop der jaren, totdat ze zich op een bepaald punt in hun leven realiseren dat hetgeen waar ze naar zoeken en op hopen, dichterbij is dan ze al die tijd hebben gedacht.
Nee, helaas is One Day nog niet beschikbaar op Netflix in Nederland.
| Directing | Lone Scherfig | Director |
| Writing | David Nicholls | Screenplay |
| Sound | Rachel Portman | Music |
| Art | Mark Tildesley | Production Design |
| Production | Nina Jacobson | Producer |
| Production | Lucy Bevan | Casting |
| Crew | Nellie Burroughes | Stunt Double |
| Directing | Maj-Britt La Cour | Assistant Director |
| Camera | Benoît Delhomme | Director of Photography |
| Editing | Barney Pilling | Editor |
| Production | Tessa Ross | Executive Producer |
| Production | Jane Frazer | Co-Producer |
| Art | Martin Kelly | Art Direction |
| Art | Katrina Mackay | Art Direction |
| Art | Denis Schnegg | Supervising Art Director |
| Art | Sue Whitaker | Art Direction |
| Art | Dominic Capon | Set Decoration |
| Costume & Make-Up | Odile Dicks-Mireaux | Costume Design |
| Costume & Make-Up | Jo Adams | Makeup & Hair |
| Costume & Make-Up | Frédérique Arguello | Makeup Artist |
| Costume & Make-Up | Karen Edwards | Hairstylist |
| Costume & Make-Up | Sophie Farsat | Makeup Artist |
| Costume & Make-Up | Peter Owen | Wigmaker |
| Costume & Make-Up | Ivana Primorac | Makeup Designer |
| Costume & Make-Up | Sarah Fidelo | Hairstylist |
| Costume & Make-Up | Lesley Smith | Makeup & Hair |
| Costume & Make-Up | Nicole Stafford | Makeup & Hair |
| Costume & Make-Up | Anita Anderson | Makeup & Hair |
| Costume & Make-Up | Wendy Kemp Forbes | Makeup Artist |
| Costume & Make-Up | Suzanne Jansen | Makeup & Hair |
| Costume & Make-Up | Matthew Smith | Prosthetic Makeup Artist |
| Costume & Make-Up | Zoey Stones | Makeup Artist |
