People educated at Westminster School, London

Nigella Lucy Lawson (born 6 January 1960) is an English food writer and television cook.

Michael Holbrook Penniman Jr. (born 18 August 1983), known professionally as Mika ( MEE-kə, stylised as MIKA), is a singer-songwriter born in Beirut, Lebanon, and raised in Paris and London.

Gavin McGregor Rossdale (born 30 October 1965) is an English singer, songwriter, musician, and actor, and is the lead singer and rhythm guitarist of the rock band Bush. Rossdale helped form Bush in 1992; upon the band's separation in 2002, he became the lead singer and guitarist for Institute and later began a solo career. Rossdale resumed his role in Bush when the band reunited in 2010. In 2013, Rossdale received the British Academy's Ivor Novello Award for International Achievement.

Helena Bonham Carter CBE (born 26 May 1966) is an English actress. She is known for her roles in both low-budget independent art films and large-scale blockbusters. She was nominated for the Academy Award for Best Actress for her role as Kate Croy in The Wings of the Dove (1997) and for Best Supporting Actress for her role as Queen Elizabeth in The King's Speech (2010); she won the BAFTA Award for Best Actress in a Supporting Role. She also won the 2010 International Emmy Award for Best Actress for her role as author Enid Blyton in the television film Enid (2009).

Christian Peter Coulson (born 3 October 1978) is an English actor best known for playing the 16-year old Tom Marvolo Riddle in Harry Potter and the Chamber of Secrets.

Jack Farthing (born 14 October 1985) is an English actor who is notable for playing Freddie Threepwood in Blandings (2013–2014) and villain George Warleggan in the BBC One drama series Poldark (2015–2019). He also appeared as George Balfour in The Riot Club (2014) and Marc Fisher in the Netflix romantic comedy Love Wedding Repeat (2020).

Grace Chatto (born 10 December 1985) is an English musician and singer who is the cellist, backing vocalist and occasional main vocalist, for the electronic music band Clean Bandit.

Andrew Lloyd Webber, Baron Lloyd-Webber (born 22 March 1948) is an English composer and impresario of musical theatre. Several of his musicals have run for more than a decade both in the West End and on Broadway. He has composed 21 musicals, a song cycle, a set of variations, two film scores, and a Latin Requiem Mass. Several of his songs have been widely recorded and were successful outside of their parent musicals, such as "The Music of the Night" and "All I Ask of You" from The Phantom of the Opera, "I Don't Know How to Love Him" from Jesus Christ Superstar, "Don't Cry for Me, Argentina" from Evita, "Any Dream Will Do" from Joseph and the Amazing Technicolor Dreamcoat, and "Memory" from Cats. In 2001 The New York Times referred to him as "the most commercially successful composer in history". The Daily Telegraph ranked him the "fifth most powerful person in British culture" in 2008, with lyricist Don Black writing "Andrew more or less single-handedly reinvented the musical."

Andrew Michael Graham-Dixon (born 26 December 1960) is a British art historian and broadcaster.

Gary Frederick Holton (22 September 1953 – 25 October 1985) was an English singer-songwriter, musician and actor from London. He was the frontman of the band Heavy Metal Kids (1972–77), worked with Casino Steel (1981–84), and played the part of Wayne in the UK television comedy Auf Wiedersehen, Pet (1983–85). Holton died from an overdose of morphine combined with alcohol in 1985.