Sienna Miller, 42, looks chic in a tailored purple suit as she attends the King's Foundation Carol Concert

Sienna Miller looked effortlessly chic as she attended the King’s Foundation Carol Concert at St Paul’s Church in Knightsbridge, London on Thursday.

The actress and model, 42, cut a stylish figure in a tailored purple suit and statement black buttons.

She teamed her look with a stunning chunky gold necklace and shimmering red high-heels.

Mother-of-two Sienna and Oli Green welcomed their first child together earlier this year after they started dating in 2022.

She gave birth to her daughter Marlowe, now 12, with her ex Tom Sturridge in July 2012.

Sienna welcomed her second child earlier this year with Oli. In an interview with Stellar Magazine, she expressed her high recommendation for late motherhood.

Sienna Miller, 42, looked effortlessly chic as she attended the King's Foundation Carol Concert at St Paul's Church in Knightsbridge, London on Thursday

At the King’s Foundation Carol Concert in London, Sienna Miller, 42, showcased effortless chic as she attended the event at St Paul’s Church in Knightsbridge.

The actress and model cut a stylish figure in a tailored purple suit and statement black buttons

The actress and model cut a stylish figure in a tailored purple suit and statement black buttons

It comes after Sienna joined Kate Winslet, Benedict Cumberbatch and James Norton at a star-studded carol service on Wednesday evening.

The group of A-listers were seen leaving St George’s Church following the Story of Christmas Appeal last night in Hanover Square, London.

Sienna cut a cool figure in a black tuxedo and bow tie ensemble, which she styled with a white shirt and a pair of statement earrings.

The actress wore her dark blonde locks up in a chic updo and opted for a glamorous coat of make-up with a slick of red lipstick.

She accessorised with a red clutch bag and added height to her petite frame with a pair of simple back stilettos.

The stars enjoyed performances from the Band & Fanfare Trumpeters of the Scots Guards and the Choir of Westminster Cathedral. 

Celebrity readers included Rowan Atkinson, Simon Callow, Victoria Coren Mitchell, Benedict Cumberbatch, Rupert Everett and Aled Jones.

During the event, various speakers addressed the congregation, including Ian Hislop, The Lord Bishop of London, Sienna Miller, and other notable figures such as James Norton, David Mitchell, Hussina Raja, and Sophie Raworth.

She teamed her look with a stunning chunky gold necklace and shimmering red high-heels

She teamed her look with a stunning chunky gold necklace and shimmering red high-heels

Mother-of-two Sienna and Oli Green welcomed their first child together earlier this year after they started dating in 2022

Mother-of-two Sienna and Oli Green welcomed their first child together earlier this year after they started dating in 2022

She gave birth to her daughter Marlowe, now 12, with her ex Tom Sturridge in July 2012

She gave birth to her daughter Marlowe, now 12, with her ex Tom Sturridge in July 2012

Sienna is the latest high-profile celebrity to become an ambassador for the King’s charity, The King’s Foundation

Sienna is the latest high-profile celebrity to become an ambassador for the King’s charity, The King’s Foundation

The actress gave a heartfelt speech at the carol concert

The actress gave a heartfelt speech at the carol concert

Sienna (right) lit a candle alongside other attendees inside St Paul's Church

Sienna (right) lit a candle alongside other attendees inside St Paul’s Church

The stars also rubbed shoulders with some Hollywood A-listers including Sienna Miller (left) and Kate Winslet who were also in attendance at the carol service

Sienna Miller, Kate Winslet, Benedict Cumberbatch and James Norton were among the Hollywood elite attending a star-studded carol service on Wednesday evening

The group of A-listers were seen leaving St George's Church following the Story of Christmas Appeal last night in Hanover Square, London (pictured with Benedict Cumberbatch)

The group of A-listers were seen leaving St George’s Church following the Story of Christmas Appeal last night in Hanover Square, London

Sienna was pictured speaking to a guest at the event

Sienna was pictured speaking to a guest at the event

The charity event this year raised more than £1million for the first time in the event’s 47 year history.

The Story of Christmas was founded in 1987 and is an annual Christmas charity event  supported by the property and construction industries. 

Held each year in December, it begins at St George’s Hanover Square with a spectacular service of Nine Lessons and Carols. 

Readings are presented by a dazzling array of celebrated names from public life.

Festive music is performed by the Band & Fanfare Trumpeters of one of the Foot Guard Regiments and a leading choir. 

Following the service there is a fully-catered champagne reception and charity auction at the Sheraton Grand London Park Lane on Piccadilly.

The event raises funds to support a broad and diverse range of charitable projects, benefitting homelessness and disadvantaged children.

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