broke down in tears, puffed on her vape and stripped off as a slew of stars and family members turned out in support of the songstress on Sunday.
The star was lauded for her acting during the London Palladium show, which chronicles her divorce from philandering star following the October release of her ode to their split West End Girl.
Leading the celebrity sightings in the crowd was , who played David's daughter in 2021's Black Widow and 2025's Thunderbolts, yet pledged allegience to Lily upon the release of the searing album.
She sat alongside Lily's emotional half-sister Sarah Owens, who looked proudly at her sibling, while the star's older daughter Ethel, 15, was sat on a balcony and her pal was in attendance in a kooky crocheted hat.
Sources at the show said: 'The audience was full of celebrities. Loads of them got emotional during the performance. Florence was a particular surprise given her recent work with David. She seems to have picked a side!'
Lily Allen fans threw their support behind the star to the fullest as she hit the stage for her West End Girl show at the London Palladium on Sunday night
The star was lauded for her acting during the London Palladium show, which chronicles her divorce from philandering Stranger Things star David Harbour following the October release of her ode to their split West End Girl
She was seen vaping on stage in the incredible show
Lily was proudly supported by daughter Ethel, 14, who sat on the balcony in the historic building alongside a pal.
Half-sister Sarah, who previously worked with Lily on a vintage clothing line Lucy In Disguise, sat next to mega-star Florence during the show.
As well as her nearest and dearest, fans threw their support behind the star to the fullest as she hit the stage when an audience member jeered: 'F**k Harbour', in reference to her ex-husband .
Her album West End Girl is an ode to her marriage to Stranger Things actor David, to whom she was married for four years after meeting on dating app , with 14 tracks detailing in brutal honesty the breakdown of their relationship.
Upon the raw album's release, Lily revealed the songs and their viral success helped her comprehend her feelings towards the split, which allegedly saw David flout the rules of their open marriage with repeated infidelities.
Her West End Girl tour has enjoyed rip-roaring success and on Sunday evening, she was supported by fans who threw the slur about the philanderer while celebrity pals including Kelly Osbourne watched on.
In a video shared by Lily's friend Daniel Nguyen, the 'F**k Harbour' was met with huge cheers, while the fictional phone call between Lily and David in the titular track on the album saw the crowd loudly boo.
Leading the celebrity sightings in the crowd was Florence Pugh , who played David's daughter in 2021's Black Widow and 2025's Thunderbolts, yet pledged allegience to Lily upon the release of the searing album (Florence and David pictured in 2025)
Kelly Osbourne was one of many of the fans and pals (Kelly pictured with pal Daniel Nguyen)
Lily was proudly supported by daughter Ethel, 14, who sat on the balcony in the historic building alongside a pal
West End Girl is her first album in seven years and was recorded in just 10 days, in the wake of her devastating split from the actor in December 2024 after Lily discovered his three-year affair and cheating.
A whopping 10 months before the release of West End Girl, it was revealed that the split had driven Lily to seek professional help.
The Mail on Sunday revealed that the singer’s mental health deteriorated significantly after she returned from holiday to her marital home in New York in January.
It was reported that while she was at their Brooklyn townhouse, Lily, who is also mother to Marnie, 13, as well as Ethel with ex Sam Cooper, felt ‘triggered’ by the thought of him being elsewhere in the city with another woman.
A source said: ‘It was very painful for Lily to return home. David used to be her saviour and now he’s a trigger for her...
'Lily settled her kids back into the family home and took them to school for their new term, then flew herself straight to rehab. She went a day earlier than intended as she felt wobbly and desperate to escape.’
West End Girl is an ode to her marriage to Stranger Things actor David, to whom she was married for four years after meeting on dating app Raya , with 14 tracks detailing in brutal honesty the breakdown of their relationship
Lily's sister Sarah Owen was on hand to throw her support behind her co-star
