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."

He has received a number of awards, including a knighthood in 1992, followed by a peerage from Queen Elizabeth II for services to the Arts, six Tonys, three Grammys (as well as the Grammy Legend Award), an Academy Award, fourteen Ivor Novello Awards, seven Olivier Awards, a Golden Globe, a Brit Award, the 2006 Kennedy Center Honors, the 2008 Classic Brit Award for Outstanding Contribution to Music, and an Emmy Award. He is one of sixteen people to have won an Oscar, an Emmy, a Grammy, and a Tony. He has a star on the Hollywood Walk of Fame, is an inductee into the Songwriter's Hall of Fame, and is a fellow of the British Academy of Songwriters, Composers, and Authors.

His company, the Really Useful Group, is one of the largest theatre operators in London. Producers in several parts of the UK have staged productions, including national tours, of the Lloyd Webber musicals under license from the Really Useful Group. Lloyd Webber is also the president of the Arts Educational Schools London, a performing arts school located in Chiswick, West London. He is involved in a number of charitable activities, including the Elton John AIDS Foundation, Nordoff Robbins, Prostate Cancer UK and War Child. In 1992 he set up the Andrew Lloyd Webber Foundation which supports the arts, culture and heritage in the UK.