Cheryl is being harassed by fans after she supported former nemesis Lily Allen at The Pillowman

She’s no stranger to dealing with a commotion at the stage door after her successful run in 2:22 A Ghost Story.

But Cheryl’s attempts to go incognito after attending Pillowman’s press night at the Duke Of York Theater was ignored Wednesday.

The singer, 39, did not star in the production, but came along to support Lily Allen – who had previously worked on Ghost Story like her.

Still, Chery’s performance at the event was somewhat surprising given her longstanding feud with Lily.

The pair first started feuding in 2006 when Lily dropped the name Cheryl on the B-side of her debut single Smile.

Cheryl didn’t react well to the track and when chef Gordon Ramsay asked about Lily on his show, The F Word, the singer called Lily a “chick with ad***”

Lily then reacted strongly when she wrote a scathing open letter to Cheryl on her Myspace page.

She wrote, “Cheryl, if you’re reading this, I may not be as pretty as you, but at least I write and SING my own songs without the help of autotune.”

“I must say that taking your clothes off, dancing sexy and marrying a rich football player must be very satisfying, your mother must be so proud, you stupid bastard.”

Five years later, Lily reignited the feud when she referenced Cheryl’s 2003 assault conviction on Twitter, leading Cheryl to unfollow her.

Speaking to French football magazine SoFoot, Lily said: “She’s just ab**ch. She represents everything I hate. She’s stupid, superficial and as ugly on the outside as she is on the inside.’

But in 2018, Lily finally apologized to Cheryl, citing the reason behind their 12-year feud over her own sexual frustrations and jealousy over her success.

Reflecting on the rivalry in her book My Thoughts Exactly, she wrote, “I was frustrated, wrestling with my own issues around sexuality.

“I had never had an orgasm before, and then there were these gorgeous girls — my peers, peers, so to speak, and colleagues — who took their clothes off with wild abandon and were loved and rewarded. I couldn’t handle it.

“Sorry Cheryl, I was mad because I hadn’t come yet, it was ridiculous. I laughed at Cheryl for insulting me after I challenged her.”

The Sheezus hitmaker added that she resented Cheryl for her success with Girls Aloud and regretted writing Cheryl’s mom “must be so proud you stupid son of a bitch” for Cheryl “marrying a rich football player,” noting that the tweet “was such a terrible thing to say”.

Now that the pair had finally buried the hatchet, Cheryl looked buoyant after seeing Lily perform at press night.

Despite putting on sunglasses to leave the theater, Cheryl was instantly recognized by her fans, who ran for autographs and selfies.

Happy to help, the Crazy Stupid Love hitmaker made sure everyone got what they wanted before hitting the road with fellow Ghost Story star Jake Wood.

The former Girls Aloud star looked incredible for her rare event appearance as she donned a nice white cardigan and matching pants.

She paired her look with a black shoulder bag with a gold chain and opted for comfortable trainers.

The beauty wore her dark brown locks pinned back with pretty tendrils around her face while opting for natural makeup.

Cheryl looked cheerful as she beamed for the cameras in her fashionable ensemble.

She looked cheerful after supporting Lily, who has returned to the stage in Martin McDonagh’s play.

She stars as Katurian in the 2003 revival of the play, which follows the fiction writer as she is imprisoned by a totalitarian state.

Lily is the first woman to play the Katurian, after David Tennant played the main character in the original 2003 Olivier Award-winning play.

Speaking about the decision to cast a woman in the role, Lily told The Telegraph: I think it will add an extra layer of horror because we’re not used to seeing women get beat up.

“It will be shocking, in that sense. I also feel that men don’t necessarily get the same c**p for their artistic output as women do.’

The Pillowman follows Katurian as she is brutally interrogated by the authorities after a spate of murders bears similarities to her short stories.

The critically acclaimed play, directed by Matthew Dunster, also stars Daniel Millar and Rebecca Lee.

The production runs at the Duke of York Theater until September 2, and the highly anticipated opening night on Friday has already sold out.