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Grace star John Simm has a famous wife of 20 years - and you'll definitely recognise her


The actor married Kate Magowan in April 2004


Man standing on staircase© Sally Mais
Megan Bull
Megan BullTV Writer
Updated: April 13, 2025
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John Simm has established an impressive career thanks to his roles in Life On Mars, Doctor Who and Grace. Celebrated for his work on TV, the 54-year-old shares his love of acting with his wife of 20 years, Kate Magowan, who has appeared in a number of popular TV shows, including Silent Witness, EastEnders and Spotless. Keep reading for all the details...

WATCH: Behind the scenes of ITV show Grace

Meet John Simm's wife, Kate Magowan

Kate Magowan is an English actress and producer. After graduating from The Actors' Institute in Swindon, she landed her first on-screen role in season two of Dream Team (1998) – Sky 1's first original drama series. 

John Simm in a blue suit and white shirt hugging his wife Kate in a dress© Getty
Kate Magowan is an English actress and producer

Making the transition into film, Kate has also starred in 24 Hour Party People (2002),  Kidulthood (2006), Stardust (2007), and 4.3.2.1 (2010). Throughout her career, the 49-year-old has acted alongside her husband, John, on multiple occasions. 

kate magowan stardust© Photo: Rex
She famously portrayed Princess Una in Stardust

As well as starring in the films Is Harry On The Boat? (2001) 24 Hour Party People (2002), Devilwood (2006) and Tuesday (2008), both landed roles in the BBC series, Exile, which premiered in 2011. 

John and Kate's relationship timeline and home life

While the exact details of John and Kate's first meeting have never been revealed, they began their working relationship by acting alongside one another in the 2001 drama, Is Harry On The Boat? Later marrying in April 2004, the couple tied the knot in the Forest of Dean, Gloucestershire. 

kate magowan wedding day© Photo: Instagram
Kate opted for a stunning satin wedding dress

John has always been extremely private about their relationship but in a 2019 interview with The Guardian, the actor was quizzed about his on-stage role as Macbeth, and whether his relationship with Kate bore any similarities to the titular character and his wife, Lady Macbeth. "Only in the fact that he worships her, and she is the glue that holds everything together," John replied. 

John Simm (second left) with his son Ryan Simm (left), daughter Molly Simm (second from right) and wife Kate Magowan, arriving at the launch of Skate at Somerset House with Fortnum & Mason, at Somerset House, London© Jonathan Brady - PA Images
Kate and John with their children

Following their wedding, John and Kate welcomed two children, a son Ryan and a daughter, Mollie. Often posting about their family life on Instagram, back in 2020, Kate revealed that they had relocated from London to Brighton, where Grace is currently filmed. Sharing several photos of their new hometown, she wrote: "Goodbye London, it's been memorable. Hello BRIGHTON!"

In 2022, Kate and John celebrated 22 years together, and the actress marked the anniversary with a sweet post on Instagram. "22 Years My Valentine," she penned alongside a selfie of the couple. 

View post on Instagram
 

More recently, Kate shared her pride after John played the lead role in a production of A Christmas Carol at The Old Vic Theatre over the festive period. Taking to Instagram at the end of last year, the actress praised her husband's performance. "Truly magical. Beyond proud of my love @johnsimmofficial as Scrooge in this year's @oldvictheatre production of A Christmas Carol," penned Kate, adding: "It really is the most beautiful show, the entire cast, the music, the spectacle ALL of it - just breathtaking!"

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