Barry Keoghan has revealed he has undergone a cosmetic procedure loved by Kim Kardashian and Naomi Watts that costs up to £4,500, following rife speculation about his changing appearance.The 34-year-old – who is currently filming the four-part Beatles biopic, in which he plays Ringo Starr – has turned to a high-tech skin-tightening treatment called XERF, which is designed to ‘lift and firm the face’ without surgery or injections.In an Instagram video shared by celebrity skin specialist Nilam Holmes, Keoghan is seen lying on a treatment bed in a clinic wearing a white headband as the practitioner moves a handheld device across his cheeks, around his nose and along his jawline.The Irish actor said on the video: ‘I’ve been hearing a lot about it and Nilam is very excited about it. And she’s brilliant at what she does. I really mean that.’He added: ‘Every time I come in, it’s very relaxing and therapeutic. Nilam looks after my skin. I feel better about myself. I look better. I think it’s important to look after yourself inside and outside.’The treatment, which was developed in South Korea and has become increasingly popular among Hollywood stars, uses controlled bursts of radiofrequency energy to heat the deeper layers of the face. Barry Keoghan has revealed he has undergone a cosmetic procedure that costs up to £4,500, following rife speculation about his changing appearance Keoghan’s changing appearance prompted widespread speculation that he had undergone cosmetic enhancements (pictured right in March, left in 2024) The treatment, which was developed in South Korea, has become increasingly popular among Hollywood stars, with Kim Kardashian calling it one of her favourite treatmentsThis encourages the body to produce collagen, the natural protein that keeps skin firm, with the aim of tightening loose skin, sharpening the jawline and creating a more youthful appearance.Unlike a facelift, the procedure involves no cuts, needles or anaesthetic, and patients can generally return to their normal activities immediately afterwards.The results are designed to develop gradually over several months as new collagen forms beneath the skin.A single full-face session with Ms Holmes costs £2,500, while a course of two treatments, spaced four to eight weeks apart, costs £4,500.Each appointment takes around 90 minutes, with the clinic claiming the results can last between 12 and 18 months.Keoghan has now had two sessions, though it is not known if he paid for the treatment.Kim Kardashian, 46, previously shared footage of herself undergoing XERF, describing it as her ‘new fave tightening laser’ and saying it ‘doesn’t even hurt’.Despite her description, XERF uses radiofrequency energy rather than a laser.Film star Naomi Watts, 58, also documented herself having the treatment in May, saying at the time: ‘Feels so good! No pain. No downtime. Snatched.’Keoghan’s revelation comes after his changing appearance prompted widespread speculation he had undergone cosmetic enhancements. When he attended the New York premiere of Peaky Blinders: The Immortal Man in March, observers remarked on his fuller cheeks and lips (pictured with Rebecca Ferguson) The Saltburn actor’s dramatic change in appearance has been noticed by plastic surgeons (pictured in 2018 left, in 2024 right) Film star Naomi Watts, 58, also documented herself having the treatment in May, saying at the time: ‘Feels so good! No pain. No downtime. Snatched’When he attended the New York premiere of Peaky Blinders: The Immortal Man in March, observers remarked on his fuller cheeks and lips.A cosmetic dermatologist subsequently told the Daily Mail that the increased fullness in his face appeared ‘consistent with cheek filler’.’When larger volumes are placed through the mid-face it can create a rounded or slightly “puffy” appearance,’ Dr Nora Jaafar explained.Earlier this year, Keoghan showed off a much fuller pout as he posed for photos in front of Tower Bridge in London before Burberry’s quintessentially British presentation. ‘Barry Keoghan’s appearance has definitely sparked conversation around his lips looking fuller, and whether that is down to treatment, lighting, or natural variation remains to be seen,’ said Dr Barbara Kubicka, the founder of ClinicBe. ‘What is important here is that it reflects how closely male facial changes are now noticed and discussed. Moments like this mirror what we see in clinic, where men are increasingly open to subtle lip enhancement that prioritise balance rather than obvious volume.’ However, the assessment was based on his appearance in photographs rather than confirmation of any treatment, and Keoghan has never publicly confirmed having fillers. His newly revealed XERF treatment does not involve injecting anything into the face.There is a growing trend for male celebrities to undergo cosmetic procedures, and Keoghan has previously spoken candidly about the devastating effect of criticism over his looks.In March, he revealed that cruel online comments had made him reluctant to leave his home and even left him questioning whether he wanted to continue appearing on screen.’There’s a lot of abuse of how I look,’ he told SiriusXM’s The Morning Mash Up. ‘It’s made me really go inside myself, not want to attend places, not want to go outside.’He added: ‘When that starts leaking into your art, it becomes a problem because then you don’t even want to be on screen anymore.’The actor, who shares son Brando with former partner Alyson Kierans, also expressed concern that his little boy would one day read the hurtful remarks.Keoghan has previously admitted he struggled with being considered an unconventional leading man before his role in Saltburn transformed his image.’It’s nice not just being looked at as the weird-looking guy,’ he told GQ in 2024. ‘My prettiness didn’t get me this far,’ he added, acknowledging that his newfound heart-throb status had opened up opportunities.