The Crown co-stars Claire Foy and Matt Smith appear in good spirits as they celebrate their new play Lungs with an after party in London

They have remained firm friends since their starring roles in The Crown. 

And Claire Foy and Matt Smith appeared in good spirits as they celebrated their new play Lungs, which made its debut earlier this week, with an after party in London on Saturday night.

The two stars, aged 35 and 36, attended the bash with the play's writer Duncan Macmillan and director Matthew Warchus. 

Celebrate: Claire Foy and Matt Smith appeared in good spirits as they celebrated their new play Lungs, which made its debut earlier this week, with an after party in London on Saturday

Celebrate: Claire Foy and Matt Smith appeared in good spirits as they celebrated their new play Lungs, which made its debut earlier this week, with an after party in London on Saturday

Claire and Matt put on a chipper display as they shared an in-joke and were later seen in an animated conversation with Duncan.

Looking effortlessly chic, Claire opted for a stunning figure-hugging black dress with a feathered hem.

While Matt looked dapper in a black trench coat, white T-shirt and skinny jeans for the celebration.  

It comes after recent snaps from rehearsals show the First Man actress and her co-star looking delighted as they transformed into the loving couple M and W earlier this month.

Pals: The two stars, aged 35 and 36, have remained firm friends since their starring roles in The Crown

Pals: The two stars, aged 35 and 36, have remained firm friends since their starring roles in The Crown 

Lungs: Claire and Matt attended the bash with the play's writer Duncan Macmillan and director Matthew Warchus

Lungs: Claire and Matt attended the bash with the play's writer Duncan Macmillan and director Matthew Warchus 

Star-studded: Dustin Lance Black and his husband Tom Daley were in attendance at the after party on Saturday night

Star-studded: Dustin Lance Black and his husband Tom Daley were in attendance at the after party on Saturday night 

The play, which began its run on October 14, follows a couple named M and W, played by Claire and Matt, as they discuss giving birth in the current climate with issues surrounding carbon footprints and political issues.

The pair were first seen together again when they attended the launch of the newly refurbished theatre earlier in that day.

Matt is in a long-term relationship with Downton Abbey star Lily James, 30. While Claire announced her split from her husband, actor Stephen Campbell Moore, 41, in February last year.

While Claire played the lead role in The Crown, winning a Golden Globe award for her performance, it emerged last year that she had been paid less than Matt.

Appearance: Four Weddings and a Funeral star Simon Callow was pictured at the event

Appearance: Four Weddings and a Funeral star Simon Callow was pictured at the event 

Gorgeous: Claire styled her brunette locks into a glossy blow-dried hairdo, she added a slick of minimal make-up

Gorgeous: Claire styled her brunette locks into a glossy blow-dried hairdo, she added a slick of minimal make-up 

Get flirty in feathers like Claire wearing 16ARLINGTON

Anyone who wears 16ARLINGTON to an event is bound to be greeted with an influx of compliments.

Their sleek, sophisticated and feminine silhouettes are often trimmed with flirty feathers, so it’s no wonder stars such as Laura Carmichael, Ashley Graham and Lena Dunham opt to wear their pieces for A-list appearances.

Joining the glam squad is Claire Foy, who wore this look from their SS20 collection at a party for her new play. Teaming an asymmetric top and feather-trimmed trousers, Claire gave us a boardroom to bar outfit idea that we’re keen to copy.

Sadly, the collection isn’t available to buy yet, but shop the current collection at Farfetch via the link (right).

Alternatively, recreate Claire’s look in a pair of similar trousers from the carousel below, which includes P.A.R.O.S.H., Essentiel Antwerp and Cinq á Sept.

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Friendly: The duo put on a chipper display as they shared an in-joke and were later seen in an animated conversation with Duncan

Friendly: The duo put on a chipper display as they shared an in-joke and were later seen in an animated conversation with Duncan

Chic: Looking effortlessly chic, Claire opted for a stunning figure-hugging black dress with a feathered hem

Chic: Looking effortlessly chic, Claire opted for a stunning figure-hugging black dress with a feathered hem

Wow: Claire looked stunning in her overcoat which protected her from the October chill
Arrival: The star made a glamorous arrival ahead of the party

Wow: Claire looked stunning in her overcoat which protected her from the October chill

Claire took on the role of the young Queen Elizabeth II, while Matt played her husband Prince Philip. 

After finding out that he received £10,000 more per episode, she said she was upset and felt like she had become an 'inadvertent spokesperson' for woman in the gender pay gap row.

'I was deeply hurt by it, because I’d been working on that show for two years. I loved everybody on it, and then I realised, there’s been a big, fat, dirty secret that nobody’s ever talked about,' she told Porter magazine last year.

Looking forward to it: Claire arrived at the Old Vic with a friend and looked excited for the event in honour of her new play

Looking forward to it: Claire arrived at the Old Vic with a friend and looked excited for the event in honour of her new play

They're back! The play, which begun its run on October 14, follows a couple named M and W, played by Claire and Matt, as they discuss giving birth in the current climate with issues surrounding carbon footprints and political issues

They're back! The play, which begun its run on October 14, follows a couple named M and W, played by Claire and Matt, as they discuss giving birth in the current climate with issues surrounding carbon footprints and political issues

The Crown: Claire took on the role of the young Queen Elizabeth II, while Matt played her husband Prince Philip (pictured together in character)

The Crown: Claire took on the role of the young Queen Elizabeth II, while Matt played her husband Prince Philip (pictured together in character) 

'But there was also that thing [of being] an inadvertent spokesperson. Why did it have to be me? I could have said nothing. And I think everyone would have preferred that.'

Matt stuck up for his pal Claire amid the pay row and The Crown producers apologised to both of them for the furore.

Despite the wage disparity, it seems that the pair have maintained a strong friendship off screen.

Olivia Colman and Tobias Menzies, both 45, have taken over from the pair for the third series of the drama, which is set for release later this year. 

New role: Olivia Colman (pictured) and Tobias Menzies, both 45, have taken over from the pair for the third series of the drama, which is set for release later this year

New role: Olivia Colman (pictured) and Tobias Menzies, both 45, have taken over from the pair for the third series of the drama, which is set for release later this year 

The Crown co-stars Claire Foy and Matt Smith celebrate their new play Lungs

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