Oliver Sim

Oliver Sim (born 15 June 1989) is an English singer and bass guitarist. He is a member of the xx and released a solo album, Hideous Bastard, in 2022, which peaked at No. 58 on the UK Albums Chart. Sim grew up living in a Fulham council flat with his mother, 5 minutes away from Madley Croft. They attended the same primary school and then met Jamie Smith (Jamie xx) and Baria Qureshi when they were 11, at the induction day for Elliott School, the secondary school they all attended. Sim received his first bass guitar on his 14th birthday.

Solo Work 2022-2023: Debut album Hideous Bastard Sim's first solo album draws on queer and horror imagery, as well as a range of pop-culture references, as "he grapples with identity, shame and expectations of masculinity." Sim has described growing up identifying with characters in horror films, the monsters who come back to wreak revenge, as well as the "scream queens" and "final girls", such as Sissy Spacek in Carrie, Sigourney Weaver in Alien, Jamie Lee Curtis in Halloween, or Buffy the Vampire Slayer, as they represent both femininity and anger. The album was produced by Jamie xx. He described the use of gender non-specific pronouns in the xx, as coming both from an agreement with Romy to make the lyrics universal, but also from a place of insecurity about his sexuality. .

Hideous Bastard received a 3-star review from The Guardian , a 4-star review from NME , and a glowing 5-star rating from DIY Magazine .

An orchestral version of Fruit, entitled Fruit (Red, White & Royal Blue Version), was later released in 2023 as part of the soundtrack for the Amazon Prime Video film Red, White & Royal Blue .

2025 In June 2025, Sim and Romy joined their bandmate Jamie xx at Glastonbury Festival to perform Jamie xx's new track Waited All Night . The track was released as a single on 18th September and was also included in Jamie xx's second solo album, In Waves, released two days later .

Sim released his single Obsession in August 2025. It was produced by Bullion and Taylor Skye, the first music Sim had not produced with Jamie xx. It was premiered on BBC 6Music by Nick Grimshaw on 27 August 2025. On this show, Sim stated that the song was about lust and infatuation.

In October 2025, Sim released the single Telephone Games, also produced by Bullion. The single was released with a video directed by Sharna Osborne. Telephone cards were placed in telephone boxes across London to tease the release.

Modelling Between the xx's second and third albums, Sim modelled for Dior.

Solo discography Studio albums Hideous Bastard (Young, 2022) UK No. 58

Singles Obsession (2025) Telephone Games (2025) 2024 Waited All Night Jamie xx, Romy In Waves

Best Independent Album Hideous Bastard Best Independent Remix GMT remix ft. Jamie xx