Rosie Day

Day is an ambassador for stem4, a teenage mental health charity. Her debut book, Instructions for a Teenage Armageddon—based on her one-woman show of the same name—was published in 2021.

• Name — Rosie Day • Birth Name — Rosie Jane Day • Birthplace — Cambridge, Cambridgeshire, England • Occupation — Actress, writer, director • Years Active — 1999–present

At the age of four, Day was spotted by a casting director and given her first role, playing Emma on the first season of the BBC drama series Hope and Glory, which aired in 1999. She featured as one of the Dudakov children in Maxim Gorky's Summerfolk at the Royal National Theatre the following year, and went on to build a strong reputation as a child actor in such series as Black Books, Family Affairs, Bernard's Watch, My Life as a Popat, and Harley Street. Though she did not train professionally, Day drew from her experiences working alongside adult co-stars, studying and imitating them. In 2010, at age 16, Day played Naomi in the Anya Reiss play Spur of the Moment on the West End. She made her feature film debut in 2012, starring as sex-trafficking victim Angel in the horror film The Seasoning House. The role brought her critical acclaim, as well as a Best Actress win at the Screamfest Horror Film Festival. To prepare for the part, Day conducted extensive research into "the experience of women who [had] been in that situation", while also learning sign language. She later said that playing Angel had "certainly had an effect" on her. In 2013, Day was chosen as one of Screen Internationals "Stars of Tomorrow". In 2015, Day co-starred as Sarah Jessica Parker's defiant teenage daughter in the romantic comedy All Roads Lead To Rome, citing Parker as "a huge influence" professionally. From there, she returned to the small screen for the recurring role of Mary Hawkins on the second season of the Starz historical drama, Outlander. Airing in 2016, Day was suggested for the part of Hawkins by Scottish actor Sam Heughan, with whom she had worked two years previously. Day's performance in the 2017 drama Butterfly Kisses was well received, with the film going on to win a Crystal Bear at the 67th Berlin International Film Festival. Day appeared as Pam Tennison in the ITV miniseries Prime Suspect 1973 that same year, and began starring as Tina Pemberton in the Sky One comedy-drama series Living the Dream; a role she played until 2019. In 2018, Day starred as Sierra, a troubled boarding school pupil, in the supernatural horror film Down a Dark Hall. Describing herself as a feminist, Day said that she was attracted to the project because of its female-centred approach. She then portrayed actress Jane Asher in a 2019 episode of Sky Arts' Urban Myths, and starred as the drug-addicted mother of a newborn in the 2020 psychological thriller film Baby, with Screen Daily describing her performance in the latter as "expressive" and "persuasive". Day starred in the improvisational comedy film Real Love in 2021, as well as voicing the character of Meteion in the video game Final Fantasy XIV: Endwalker. Following guest roles on McDonald & Dodds and Call the Midwife that same year, Day appeared in the self-penned one-woman show, Instructions for a Teenage Armageddon, which—after previewing in 2020—ran from February to March 2022 at the Southwark Playhouse. Writing for WhatsOnStage.com, Alun Hood described her portrayal of Eileen in Armageddon as "impressive and unsettling", adding that it was imbued with "sparky, nihilistic wit". Next, Day co-starred as murder victim Kelly Flint in the vigilante thriller film Hard Home, which debuted on streaming platforms in 2024.

It was announced in March 2025 that Day's debut novel, Vipers, had been acquired by Serpent's Tail for release in 2027. It follows the publication of her non-fiction book, Instructions for a Teenage Armageddon, in 2021. and I Think I Like Girls in 2025. Her Audible Original, The Tutor starring Mia Mckenna-Bruce and Alex Hassell went to Number One in 2026.

• Year — Title — Role — Notes • 1999 — Hope and Glory — Emma — Main cast (series 1) • 2000 — Black Books — Lucy — 3 episodes • 2002 — In Deep — Charlotte — 2 episodes • Big Train — Jenny — Episode #2.3 • Family Affairs — Harriet Matherson — 7 episodes • Darwin's Daughter — Etty Darwin — Television film • 2003 — Trust — Emma Naylor — Miniseries; main cast • 2004–2005 — Bernard's Watch — Nicolette Ashbury — Main cast • 2006 — The Large Family — Laura Large (voice) — Main cast • The Romantics — Dorothy Wordsworth — Episode: "Liberty" • 2007 — Fallen Angel — Lucy (voice) — Episode: "The Four Last Things" • My Life as a Popat — Tatiana — Main cast (series 2) • 2008 — Harley Street — Tess Elliot — 4 episodes • 2009 — Half Moon Investigations — Shell Travers — Episode: "The Case of the Purple Pool" • 2009; 2011 — Doctors — Meg White; Alice Goodson — 2 episodes • 2010 — Summer in Transylvania — Mirana — Episode: "Attack of the Psycho Dates" • 2012 — Holby City — Kay Barker — Episode: "Butterflies" • DCI Banks — Hannah Rothwell — 2 episodes • Homefront — Millie Bartham — Miniseries; main cast • 2013 — Misfits — Lucy — Episode #5.1 • 2014 — Siblings — Ellie — Episode: "Intern School" • 2015 — Cuffs — Stacey Shawcross — 3 episodes • 2016 — Grantchester — Joan — Episode #2.3 • Outlander — Mary Hawkins — Recurring (series 2) • 2017 — Prime Suspect 1973 — Pam Tennison — Miniseries; main cast • Watership Down — Thethuthinnang (voice) — Miniseries; main cast • 2017–2019 — Living the Dream — Tina — Main cast • 2018 — Baby Shower — Rosie — Web series; episode: "Legend on Board" • 2019 — Frank — Bonnie — Unaired pilot • Good Omens — Lisa — Episode: "The Doomsday Option" • Urban Myths — Jane Asher — Episode: "Paul McCartney's Scrambled Eggs" • 2020 — Agatha Raisin — Karen — Episode: "Love from Hell" • 2022 — McDonald & Dodds — Rose Boleyn — Episode #3.3 • 2021 — Call the Midwife — Anita Page — Episode: "Christmas Special" • 2022 — The Sandman — Tabby Kitten (voice) — Episode: "Dream of a Thousand Cats"

• Year — Title — Role — Notes • 2021 — Bravely Default II — Anihal • Final Fantasy XIV: Endwalker — Meteion / The Endsinger • 2022 — Triangle Strategy — Cordelia Glenbrook; Decimal; Quahaug • Arknights — Platinum • 2023 — Ten Dates — Misha • Xenoblade Chronicles 3: Future Redeemed — A • 2025 — Honkai: Star Rail — Hysilens • 2025 — Eriksholm: The Stolen Dream — Hanna • Genshin Impact — Keqing — Version 5.7 and after; replaced Kayli Mills • 2026 — Dragon Quest VII Reimagined — Additional voices

• Year — Title — Role — Notes • 2008 — Mother Spy — Janie Chisholm — BBC Radio 4 • 2017 — The Rosenthals — Pippa Lloyd — BBC Radio 4

• Year — Title — Role — Notes • 2020 — Doctor Who: The New Adventures of Bernice Summerfield — Arn (voice) — Episode: "The Undying Truth" • 2021 — The Worlds of Blake's 7 — Alixa / Senna (voice) — Episode: "Heart of Ice" • 2025 — Doctor Who: The Fourth Doctor Adventures — Betty (voice) — Episode: "The Hellwood Inheritance"

• Year — Title — Role — Notes • 2014 — Girl to Girl — Short film; also writer • 2019 — Tracks — Short film; also writer • 2020 — Celaine — Short film; also writer

• Year — Title — Role — Notes • 2000 — Summerfolk — Anya — Royal National Theatre • 2001 — The Playboy of the Western World — Lily — Royal National Theatre • 2002 — The Winter's Tale — Bohemia — Royal National Theatre • 2006 — Les Misérables — Young Cosette — Sondheim Theatre • 2010 — Spur of the Moment — Naomi — Royal Court Theatre • 2011 — Microwave — Becky — National Theatre Studio • 2012 — Pussy Riot — Kate — Royal Court Theatre • 2014 — Velocity — Dot — Finborough Theatre • 2018 — Again — Izzy — Trafalgar Studios • 2019 — The Girl Who Fell — Billie — Trafalgar Studios • 2022 — Instructions for a Teenage Armageddon — Eileen — Southwark Playhouse; also writer • | The Fellowship — Simone — Hampstead Theatre • 2024 — When It Happens to You — Esme — Park Theatre • 2025 — (This is Not A) Happy Room — Elle — King's Head Theatre; also writer

The authorities additionally record the heading Rosie Jane Day. Her recorded language was English.