Sir Cameron Mackintosh (born October 17, 1946) is a British theatrical producer. After early productions such as Side by Side by Sondheim and Tomfoolery, he hit the big time in 1981 as the producer of Cats, which holds the record for longest-running musical both in the West End and on Broadway. He has produced several other successful musicals, including Les Misérables, Miss Saigon and The Phantom of the Opera. In 1995 he produced the 10th anniversary concert of Les Misérables in London.

In June 1998, Mackintosh celebrated thirty years in the business with Hey Mr Producer!, a gala concert featuring songs from shows he had produced throughout his career. The concert was performed twice, on June 7 and June 8, with proceeds going to the Royal National Institute of the Blind and the Combined Theatrical Charities. Many celebrities took part, and the June 8 performance was attended by the Queen and the Duke of Edinburgh.