Get Back! Sir Paul and Ronnie Wood are mobbed by fans

The evening was supposed to be about James McCartney and his new concert tour.
But, the musician was overshadowed when his father and sister Paul and Stella McCartney arrived to show their support on Wednesday night.
As if the famous family members weren't enough of a distraction, Rolling Stone Ronnie Wood also turned up to steal the spotlight.

Rock royalty: Ronnie Wood and Paul McCartney joined James McCartney on stage on Wednesday night at The Ambassador Theatre in London

Super star: Sir Paul was surrounded by fans as he left the theatre after he performed with his son

Over here: Ronnie Wood was also at the centre of a scrum as fans clambered for his autograph

James, 35, played at the Ambassadors Theatre to preview his upcoming show which he is set to take to America for a 47-date tour later this year.
He performed tracks off his debut album Me as he entertained the crowds for the evening.
However, the musician was left in the shade as two of the most iconic rockers turned up to support him.
Paul watched on from the wings as his only son took to the stage, even though many fans were there in the hope of catching a glimpse of the former Beatle.

Signed with a kiss: The former Beatle was dwarfed by the sheer number of fans

Moving on: Sir Paul is used to being the centre of attention and Wednesday night was no different

The situation was exactly the same for Ronnie, who had accompanied James on his guitar. Paul also joined in the fun on stage by playing piano during the concert.
Once the show was over both Ronnie and Macca left the theatre separately as they were surrounded by fans clamouring for photographs and autographs.

He's behind you: Sir Paul made a rather theatrical entrance onto the stage behind his son

Rock out: James took centre stage while his father played piano and Ronnie played guitar

Performance tips: James was lucky enough to be joined by two of rocks greatest artists

Take a bow: The combination of Ronnie and Paul overshadowed James

The superstars still clearly have enough star power to cause commotion and pandemonium ensued when Ronnie left the venue.
At one point Paul looked slightly scared as he couldn't find his car due to all the commotion - also losing his wife Nancy Shevell in the crowds.
But the pair eventually managed to find each other, looking relieved as they settled back in their car.

A piece of history: The three musicians hugged it out on stage following the performance

Famous faces: Designer Stella McCartney and Simon Cowell were both in the audience

Puppy love: Sally Humphreys and Ronnie hung out with a dog backstage before the gig

Quick getaway: Ronnie and Sally were popular with waiting fans outside the venue

An onlooker said that one fan kept shouting that he'd come all the way from Liverpool to see Paul and wanted the rock star's autograph.
Ronnie's wife Sally Humphreys, who is a theatre producer, had put together the event and encouraged her husband to perform.
He tweeted earlier this week: 'Don't forget I'm going to be playing at the James McCartney gig this Wednesday.'

Family support: The brother and sister left the venue arm in arm after a successful gig

Talented pair: Ronnie's wife Sally, who is a theatre producer, had put together the event

Lost in translation: At one point Paul looked a bit scared as he couldn't find his car due to all the commotion and lost his wife Nancy Shevell in the crowds

Also in attendance was British designer Stella who covered up in a long grey pinstripe coat as she watched her brother.
X Factor supremo Simon Cowell was also seen leaving the theatre in his standard black jumper and jeans combination.

Carriages please: Sir Paul and Nancy were eventually reunited in their car