The One Day cast features Ambika Mod and Leo Woodall. This info article contains minor spoilers and cast/character summaries for Nicole Taylor’s 2024 Netflix miniseries. Check out more streaming guides in Vague Visages’ Know the Cast category, and then browse complete soundtrack song listings in the Soundtracks of Cinema section.

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One Day chronicles a romantic relationship over several decades. After Emma and Dexter hook up during the late 80s, they remain friends while openly discussing their unique connection. The narrative follows the main protagonists as they grow closer during difficult times. Here’s every actor and character in One Day, an adaptation of David Nicholls’ 2009 novel.

Read More at VV — Know the Cast: ‘The Gentlemen’

One Day Cast: Ambika Mod as Emma

Character Profile: A literature enthusiast student from Leeds. She hopes to make a difference in the world. Emma feels intense feelings for a collegiate fling but questions his motivations.

Mod’s Resume: Sarah — Average Young Person in The Mash Report (2019), Samantha in The B@it (2020), Usher in Trying (2021), Shruti in This Is Going to Hurt (2022), Una Finch in I Hate Suzie (2022)

Read More at VV — Know the Cast: ‘Irish Wish’

One Day Cast: Leo Woodall as Dexter

Character Profile: Emma’s love interest. He is an anthropology student who becomes known as the “most odious man on British television.” Dexter struggles with alcoholism and his mother’s death while pursuing romantic relationships.

Woodall’s Resume: Jake Reader in Holby City (2019), Rodgers in Cherry (2021), Adrian Ivashkov in Vampire Academy (2022), Jack in The White Lotus (2022), Duke in Citadel (2023)

Read More at VV — Know the Cast: ‘Damsel’

One Day Cast: Amber Grappy as Tilly

Character Profile: Emma’s college roommate. She marries a house music fan named Graham. Tilly supports both Emma and Dexter over the years.

Grappy’s Resume: Bobbi in The Baby (2022), Lauren Thompson in Wreck (2022), AJ in Smothered (2023)

Read More at VV — Know the Cast: ‘Spaceman’

One Day Cast: Jonny Weldon as Ian

Character Profile: Emma’s co-worker during the early 90s. He is a stand-up comedian who seeks flexible hours. Ian develops a romantic relationship with Emma but struggles with jealous feelings towards Dexter.

Weldon’s Resume: Jonny in The Holden Girls: Mandy & Myrtle (2021), Samwell in House of the Dragon (2022), Will (Caterer) in The People We Hate at the Wedding (2022), Marlon Morris in Christmas on Mistletoe Farm (2022), Ben in Sneakerhead (2022)

Read More at VV — Know the Cast: ‘Through My Window: Looking at You’

One Day Cast: Tim McInnerny as Stephen

Character Profile: Dexter’s father. He is a working class gentleman who eventually becomes a widower. Stephen reminds Dexter of his humble background.

McInnerny’s Resume: Max in Notting Hill (1999), Richard in Severance (2006),  Robett Glover in Game of Thrones (2016-17), Prince Regent in Peterloo (2018), Harold in Stromboli (2022)

Read More at VV — Know the Cast: ‘Players’

One Day Cast: Eleanor Tomlinson as Sylvie

Character Profile: Dexter’s wife. She is a fencer who clashes with her aristocratic family. Sylvie cheats on Dexter with his college friend.

Tomlinson’s Resume: Young Sophie in The Illusionist (2006), Jas in Angus, Thongs and Perfect Snogging (2008), Isabelle in Jack the Giant Slayer (2013), Demelza in Poldark (2015-19), Mary Brighton in The Nevers (2021-23)

Read More at VV — Know the Cast: ‘Badland Hunters’

One Day Cast: Essie Davis as Alison

Character Profile: Dexter’s mother. She is an antiques dealer who lives vicariously through her children. Alison worries about Dexter’s motivations while struggling with a terminal disease.

Davis’ Resume: Amelia Vanek in The Babadook (2014), Cal’s Mother in Assassin’s Creed (2016), Ellen Kelly in True History of the Kelly Gang (2019), Phryne Fisher in Miss Fisher & the Crypt of Tears (2020), Cath Carney in Faraway Downs (2023)

Read More at VV — Know the Cast: ‘Orion and the Dark’

The One Day cast also includes:

• Brendan Quinn as Callum
• Adam Loxley as Graham
• John Macmillan as Aaron
• Anne Bird as Mary
• Mark Rowley as Phil Godalming
• Jodie Price as Sonya
• Rebekah Murrell as Suki
• Will Hislop as Toby
• Tim Preston as Gary
• Joe Barnes as Nigel
• Meghan Treadway as Kate
• Beth Lindsey as Sarah
• Ella-Rae Smith as Naomi
• Billie Gadsdon as Jasmine
• Edouard Chény as Jean-Pierre

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.