Jennifer Aniston and Jim Curtis Surprise Sean Hayes!

Jennifer Aniston and her boyfriend Jim Curtis joined a slew of A-list stars at the theatre on Friday night, as they surprised pal Sean Hayes at his one-man show, The Unknown in New York City.

The actress, 57, and her 'love guru' partner 50, showed their support for her fellow 90s sitcom star, Sean, 55, in the Off-Broadway production at the Studio Seaview theatre, with a host of other famous faces.

Joining couple were the likes of fellow actors, Will Arnett, Jason Bateman, Jesse Tyler Ferguson and Bradley Cooper, alongside his model girlfriend Gigi Hadid.

Sean took to his Instagram to thank his pals for surprising him by coming down to watch him treading the boards, and shared a slew of photos from backstage - which the Will & Grace star revealed were snapped by Jim.

Among them was a sweet snap of him planting a kiss on Jennifer's cheek, as well as a beaming group shot of the pair of them with his husband Scott Icenogle, Will, Jesse, Jason and his wife Amanda Anka and director Will Speck.

Captioning the heartwarming photos, Sean gushed: 'This fun bunch caught me off-guard with their surprise visit to the play tonight. Jen, Jim & crew…you all warmed my heart. Thank you for coming. ❤️'

Jennifer Aniston and her boyfriend Jim Curtis joined a slew of A-list stars at the theatre on Friday night, as they surprised pal Sean Hayes at his one-man show, The Unknown in New York City (Jennifer see with Sean)

Joining couple were a host of other famous faces (L-R top row: Amanda Anka, Jason Bateman, Sean, Will Arnett, Scott Icenogle, Jesse Tyler Ferguson, bottom row: Jennifer, Will Speck)

The actress, 57, and her 'love guru' partner 50, showed their support for her fellow 90s sitcom star, Sean, 55, in the Off-Broadway production at the Studio Seaview theatre

He also shared another snap alongside Jason and Will - with whom he hosts popular podcast SmartLess - writing: 'My dear friends. Thank you so much for coming to the play tonight.'

While not seen in any of the backstage photos, PEOPLE shared footage of Bradley and Gigi getting up from their seats to make their way out of the theatre, with the model sweetly kissing the Oscar winner's hand.

The Unknown - written by David Cale and directed by Leigh Silverman - debuted on January 31 and runs until April 12.

Sean stars as writer Elliott in the play, who goes to stay in his friend's remote cabin in an attempt to cure his writer's block, only to find that he is being stalked. 

The psychological thriller sees the Tony Award winner take on the impressive task of playing 11 different characters over the course of the 75-minute production.

Fans were thrilled by Sean's post, showing a slew of their favourite sitcom stars hanging out together, with Jason and Will both starring on Arrested Development, Jesse on Modern Family, Sean on Will & Grace and Jennifer famously on Friends.

They took to the comments to share their nostalgia and beg to be part of the friendship group, branding them 'all icons'.

They wrote: 'Now THAT's a lineup. ❤️'; 'Omg how fun!!!! I wanna be part of this clan lol'; 'Awhhhhh that’s a good crew'.

Sean took to his Instagram to thank his pals for surprising him by coming down to watch him treading the boards, and shared a slew of photos from backstage - which the Will & Grace star revealed were snapped by Jim

He also shared another snap alongside Jason and Will - with whom he hosts popular podcast SmartLess - writing: 'My dear friends. Thank you so much for coming to the play tonight'

Fans were thrilled by the photos of their favourite sitcom stars hanging out together and took to the comments to beg to be part of the friendship group, branding them 'all icons'

'Friends and Will and Grace in one picture, my two series ❤️❤️❤️'; 'What a group ! Congrats, Sean ! You were great ❤️❤️'.

'What I would do to sit at a table with that crew ♥️'; 'Friends and Will and Grace those were my Thursday Nights!!!'; 'What a crew!!'

'All are Icons!! Now, make a fantastic movie all together! ❤️'; 'Omg I want in this friend group.'; 'I want to be in your friend group ❤️'.

The day after their date night at the show, Jennifer and Jim marked a major milestone in their relationship, as they celebrated their first Valentine's Day together.

The couple have been going from strength to strength since they began dating last year, first setting off romance rumours when they were glimpsed on holiday in Mallorca, Spain, over the Fourth of July weekend.

They took their relationship to the next level in September when Jim supported Jennifer at the season three premiere of her Apple TV+ drama The Morning Show, before going Instagram official in November when he rang in his 50th birthday. 

Sharing a beaming photo of her wrapping her arms around Jim from behind, the We're The Millers star penned: 'Happy birthday my love. Cherished'.

And he returned the favour this week as Jennifer turned 57, sharing a romantic black and white photo of them kissing and another of the pair sharing a laugh while aboard a luxury yacht, captioned: 'HBD MY ❤️'.

The day after their date night at the show, Jennifer and Jim marked a major milestone in their relationship, as they celebrated their first Valentine's Day together 

The couple have been going from strength to strength since they began dating last year, first setting off romance rumours when they were glimpsed on holiday in Mallorca, Spain, over the Fourth of July weekend (seen in November)

The couple went Instagram official last November, when Jim rang in his 50th birthday with Jennifer sharing a beaming photo of her wrapping her arms around him from behind with the caption: 'Happy birthday my love. Cherished'

Last month Jim was grilled on his relationship with the Hollywood star while appearing on the Today show, and revealed how their romance began.

He explained: 'We were introduced by friends. We found out that we had mutual friends and we started to just chat. It took a long time, but we chatted for a long time and became close.'

Jim is a life coach and love 'guru,' and he describes himself as a 'transformational coach and hypnotherapist.' 

And although she has generally stayed private about her relationship in interviews, Jennifer raved about her new boyfriend's career in an interview with Elle in November.

The Horrible Bosses star gushed: 'Hypnotism is one of the many things that he does. He's quite extraordinary, and helps many, many people.

'He's very special, very normal, and very kind, and wants to help people heal, move through their trauma and stagnation into clarity. It's a beautiful thing to commit your life to.'