James Corden appeared in jovial spirts as he stepped out after performing in sell-out immersive stage show You Me Bum Bum Train on Thursday night.

The comedian, 46, quietly took on a secret role in the quirky West End show, with his involvement in the project emerging last month.

And this week, it appears he made an appearance in the performance, which takes place at a mystery office location in London and has been attended by Madonna.

The contents of the show are kept a closely-guarded secret to ensure audiences are completely surprised, but it has triggered panic attacks among some attendees.

It has racked up many A-list fans and Rylan Clark, Brie Larson and Declan Rice were all among the star-studded guest list for James’ performance on Thursday night.

Stepping out after the show, James cut a dapper figure in a grey checkered suit, which he styled with a black T-shirt and smart suit shoes.

James Corden appeared in jovial spirts as he stepped out after performing in sell-out immersive stage show You Me Bum Bum Train on Thursday night

Brie Larson, Rylan Clark and Declan Rice (L-R) were all among the star-studded guest list for James’ performance on Thursday night

He appeared to be in excellent spirits as he smiled for the cameras while heading home following the busy evening.

Meanwhile, TV presenter Rylan, 36, showed off his signature style in a blue jeans and a black vest top, which he wore underneath a brown collared shirt.

He kept comfortable in a pair of white trainers and was seen socialising with Arsenal footballer Declan, 26, as he left the mystery venue. 

Declan cut a casual figure in an forest green zip-up jumper and light blue jeans, which he teamed with white trainers and a dark baseball cap.

Also in attendance was Hollywood star Brie, 35, who is appearing herself on stage at the Duke of York’s Theatre in a version of Greek tragedy Elektra.

But she took some time out after her own show to watch You Me Bum Bum Train as she nabbed a highly-sought-after ticket for the sell-out show.

For the occasion, she cut a stylish figure in olive green wide-leg trousers, which she wore with a black jacket amid the chilly climes.

She completed her look with a pair of grey trainers and sported a unique bonnet over her brunette buzzcut. 

Stepping out after the show, James cut a dapper figure in a grey checkered suit, which he styled with a black T-shirt and smart suit shoes

James was said to have been desperate to take part in You Me Bum Bum Train ever since watching the show – which has triggered panic attacks in audience members – eight years ago

TV presenter Rylan, 36, showed off his signature style in a blue jeans and a black vest top, which he wore underneath a brown collared shirt as he stepped out with a friend

He kept comfortable in a pair of white trainers and was seen socialising with Arsenal footballer Declan, 26, as he left the mystery venue

You Me Bum Bum Train was created back in 2004 by art students Kate Bond and Morgan Lloyd and has run in many locations all around London ever since.

The show’s team is made up entirely of volunteers and a string of A-listers have taken part, with James being the latest to sign on to act for free. 

He was said to have been desperate to take part himself ever since watching the show – which has triggered panic attacks in audience members – eight years ago.

Speaking to The Sun, a source previously said: ‘James had been to see the show eight years ago when it was in London before so when he saw it was back he wanted to take in the madness himself.

‘All actors in the play volunteer for free – regardless if you’re an A-lister or have done little more than attended drama class at school.

‘The whole thing is shrouded in secrecy and no one is meant to talk about what goes on but some of the biggest names in the world have taken part.’

Little is known about what happens during the immersive show as the contents are kept a secret, with audience members having to sign confidentiality agreements. 

However, it is known that guests, known as pᴀssengers, are invited to a disused central London office building to follow real-life scenarios across a maze of interconnected rooms.

Declan cut a casual figure in an forest green zip-up jumper and light blue jeans, which he teamed with white trainers and a dark baseball cap

Also in attendance was Hollywood star Brie, 35, who is appearing herself on stage at the Duke of York’s Theatre in a version of Greek tragedy Elektra

But she took some time out after her own show to watch You Me Bum Bum Train as she nabbed a highly-sought-after ticket for the sell-out show

She cut a stylish figure in olive green wide-leg trousers, which she wore with a black jacket amid the chilly climes, while she completed her look with a quirky wooly bonnet

You Me Bum Bum Train has attracted many celebrity attendees, and Madonna allegedly baffled fans at one show by ‘prowling on all fours like a cat’ for 15 minutes

Guests are said to have been shocked when confronted with James in one of the roles, but the rules of the show meant they couldn’t address his appearance.

Madonna attended one of the performances but ‘disrupted’ the action by ‘prowling on all fours like a cat’ for 15 minutes – much to her fellow punters’ bemusement.

In one room, audience members had to pretend to be cats for a brief five minutes, but Madonna allegedly spend 15 minutes padding across the floor and meowing. 

‘Her behaviour messed up that performance as it all works to a strict timetable,’ a witness told the Daily Mail’s Talk of the Town.

‘There are only 70 or so participants a night and each move off at five-minute intervals.’ 

Prince Harry once allegedly ‘crowd-surfed’ over strangers at the show, which has also attracted Benedict Cumberbatch, Dominic West and Kate Winslet. 

The latest run of shows kicked off on November 26 and will run through until April 4, and it has proved as highly-in-demand as ever, completely selling out.

For the last show in 2015, more than 120,000 applied for tickets during the first minute of release. 

Discussing the show, co-founder Kate Bond told The Sun: ‘We wanted to create an artform that was about other people to give people rich experiences. 

‘Play and fantasy are just part of your day as a kid. Then responsibility takes over as an adult. Bum Bum Train allows people to be in that childlike mode again.’