Miranda Raison

Miranda Caroline Raison was born in Burnham Thorpe, Norfolk. Her mother is former Anglia News reader Caroline Raison (née Harvey). Her father, Nick Raison, is a jazz pianist who accompanied the BBC National Orchestra of Wales when Raison played a showgirl in the Doctor Who episodes "Daleks in Manhattan" and "Evolution of the Daleks". Raison's parents divorced when she was five years old. From a young age she attended five boarding schools, including Gresham's School, Felixstowe College and Stowe School; her education was paid for by her grandfather. It was at Felixstowe College where she developed an interest in acting; she moved there after experiencing bullying at her previous school. She trained at the Webber Douglas Academy of Dramatic Art.

From 2002 to 2003, she appeared as Ben-Hur's love interest in a minimalist production of the eponymous play at the Battersea Arts Centre. Later in 2003, she was featured in Pains of Youth, again at the Battersea Arts Centre, playing the death obsessed bisexual Desiree; Lyn Gardner of The Guardian described her performance as making "Desiree's death wish seem tragic rather than merely silly." In 2010, she played the title role in Anne Boleyn, a new play by Howard Brenton, who had also been involved in scripts for BBC's Spooks in which Raison went on to appear in 5 series, which premiered at Shakespeare's Globe on 24 July 2010. In the same Shakespeare's Globe season, Raison also played Anne Boleyn in Henry VIII by William Shakespeare. In 2011, she appeared as Ann in the short play "Oliver Lewis" by Jack Thorne, part of the series of plays 66 Books performed at the Bush Theatre. In June/July 2012, she appeared in a production of The Physicists: A Comedy in Two Acts at the Donmar Warehouse, playing the roles of Lina Rose, the lead character's ex-wife, and Monika Settler, the lead's attending nurse. From October 2012 Raison starred in The River, a new play by Jez Butterworth, at the Royal Court Theatre (Jerwood) alongside Dominic West. Tickets became "the most sought-after theatre tickets in London" after rave reviews. In 2013–14, she played Anne Faulkner in the theatrical version of Strangers on a Train at the Gielgud Theatre, produced by Barbara Broccoli. From January to February 2015, she starred opposite Shaun Evans in Hello/Goodbye at the Hampstead Theatre. In August 2015 she joined the Kenneth Branagh Theatre Company in The Winter's Tale and Harlequinade which ran at the Garrick Theatre from October 2015 until January 2016. Raison played the wife of Kenneth Branagh's character in both plays. She stated that she enjoyed the experience and was grateful for the opportunity, given that previously she had a bad audition with Branagh for Macbeth in 2011. She also enjoyed learning from Judi Dench. Raison played Ellen Terry opposite Ralph Fiennes as Henry Irving in Grace Pervades, a new play by David Hare, directed by Jeremy Herrin, at the Theatre Royal Bath, from 27 June to 19 July 2025. It marked Raison's return to the stage after nearly a decade. The play transferred to the Theatre Royal Haymarket with the same cast in the Spring of 2026.

In 2005, Raison appeared in the BBC radio comedy Deep Trouble. She has voiced several video game characters, including Cassandra Pentaghast in the Dragon Age series, Lieutenant Sandra Lansing in Apache: Air Assault and Natasha and other characters in Renegade Ops. BioWare also hired Raison for providing several voices in Mass Effect: Andromeda. She voiced three characters in The Secret World and lent her voice for Dreamfall Chapters and Blades of Time. Raison has voiced Cassandra Pentaghast since 2014, which won her the BTVA Video Game Voice Acting Award for "Best Vocal Ensemble in a Video Game" in 2015 and a nomination for Best Lead Female Actor in a Video Game. She has also acted in several Big Finish Doctor Who audios, including The Davros Mission and The Wreck of the Titan, has played Constance Clarke, a regular companion to the Sixth Doctor since 2015 and provides additional voices in other Big Finish audio productions, including other Doctor Who stories and The Avengers. Raison won the Earphones Award for The Screaming Staircase in 2013 and the Audies Award for The Book of Doors in 2025 In 2013, she joined the CGI series cast of Thomas & Friends and provides the voice of Millie (UK/US), first introduced in King of the Railway. Since July 2017, she has been narrating the BBC Two documentary Hospital. Since 2024 Raison has been narrating the This World series for BBC One.

Raison plays golf and is a member of the Aldeburgh Golf Club. While separated from her first husband, Raza Jaffrey, she began a relationship with her Married Single Other co-star Ralf Little in November 2009, which ended in February 2013. She married again in 2017 and had a daughter in that same year. In the summer of 2022, Raison gave birth to her second child. Her husband is 13 years her junior. Raison has dual nationality and holds both French and British passports. She speaks fluent French and is conversational in Italian and Spanish. Raison is a cousin to Jack Huston and Paul Raison, who was a Chairman of Christie's.