One Day

One Day is an upcoming British television series based on the 2009 novel of the same name by David Nicholls. Cast Ambika Mod as Emma Morley Leo Woodall as Dexter Mayhew Eleanor Tomlinson as Sylvie Essie Davis as Alison Mayhew Tim McInnerny as Stephen Mayhew Jonny Weldon as Ian Brendan Quinn as Callum Billie Gadsdon as Jasmine Toby Stephens as Lionel Cope Joely Richardson as Helen Cope Amber Grappy as Tilly Adam Loxley as Graham Tim Preston as Gary John Macmillan as Aaron Rebekah Murrell as Suki Jodie Price as Sonya Sophie Wolff as Tara Joseph Pharoah as Andy Meghan Treadway as Kate Ella-Rae Smith as Naomi Mathilde Thomine Storm as Tove Sam Swan as Damian Beth Lindsey as Sarah Mark Rowley as Mr. Godalming Anthony Calf as Sid Edouard Chény as Jean-Pierre Emily Eaton-Plowright as Candy John Tueart as Andrew Hannah van Vliet as Lotte Production Development Netflix ordered a new One Day adaptation in November 2021 from Drama Republic. The writers' room is being led by Nicole Taylor and consists of Anna Jordan, Vinay Patel, and Bijan Sheibani. Executive producers include Nicholls and Taylor as well as Roanna Benn and Jude Liknaitzky. Molly Manners is attached to direct the series.