Barry Keoghan Claps Along as He Watches Girlfriend Sabrina Carpenter Perform 'Espresso' at Big Weekend

The pop star performed at the BBC Radio 1 event in Luton, England on Sunday, May 26

Barry Keoghan has his eyes on Sabrina Carpenter.

On Sunday, May 26, the pop singer, 25, performed at BBC Radio 1's Big Weekend in Luton, England alongside artists including Coldplay, Vampire Weekend, Tems,

In fan-captured footage of her set on TikTok, Carpenter can be seen singing and dancing to her hit "Espresso" in an orange halter dress and white gogo boots alongside her dancers as the Saltburn star, 31, smiles and claps along as he watches her from the side-stage.

Related: Sabrina Carpenter's Boyfriend Barry Keoghan Threw Her a 25th Birthday Party Featuring a Leonardo DiCaprio-Inspired Cake

Prior to the event, a source confirmed to The Sun that Keoghan would be attending.

“Barry has been added to the VIP guest- list for Sunday and plans to cheer her on from the side of the stage. He couldn’t be more proud of her," they told the outlet.

Keoghan — who first sparked dating rumors in December 2023 — recently threw her a birthday party at DUMBO House in Brooklyn on Saturday, May 11 with about 100 friends — including rapper Ice Spice — a source told PEOPLE.

In addition to Big Weekend, the Banshees of Inisherin star has supported the "Nonsense" hitmaker at many of her performances, from her opening set on Taylor Swift's Eras Tour in Australia earlier this year to flying across the world to cheer her on at Coachella in Palm Springs, Calif., where they also hung out with fellow lovebirds Swift, 34, and her boyfriend, Travis Kelce.

In January, Keoghan and Carpenter stepped out in Los Angeles and went to Luna Luna, an art-centric theme park that recreates the original 1987 art amusement park in Germany.

"It definitely seemed like a date,” an onlooker told PEOPLE of the duo's outing at the time.

The source added that they were “cute” together and “shared a little kiss."

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Related: Sabrina Carpenter and Barry Keoghan Show PDA During 2024 Met Gala Debut — See Their Fairytale Looks

In March 2024, Carpenter and Keoghan made their red carpet debut at the Vanity Fair Oscars afterparty before attending the Met Gala together in May of that same year.

The "Sue Me" singer reportedly met Keoghan at a fashion event a week after attending an advance screening of Saltburn in New York City. According to E! News, the pair crossed paths during Paris Fashion Week when they both attended a Givenchy show.

Before dating the actor, the former Disney star was romantically linked to singers Joshua Bassett and Shawn Mendes. As for Keoghan, he was in a long-term relationship with Alyson Kierans, with whom he shares son Brando, 21 months. Keoghan called Kierans “an incredible mother” who has “done a great job” with their son during an interview with GQ in January 2024.

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