Michael Putland/Getty ImagesRobert Stigwood, a manager for legendary bands such as Cream and the Bee Gees and producer of blockbuster musical films like Saturday Night Fever and Grease, has died at the age of 81, singer Spencer Gibb, the oldest son of the late Bee Gees member Robin Gibb, shared on his official Facebook page. The cause of death was not revealed.

In 1966, Australian-born Stigwood became The Who‘s booking agent and began managing Cream. The following year, he began managing the Bee Gees, guiding them to a long string of international hits.

Stigwood later shifted his focus to theater productions and then film and TV production, with an adaptation of Jesus Christ Superstar in 1973, followed by the movie version of The Who‘s rock opera Tommy two years later. However, his biggest success came next with 1977’s Saturday Night Fever, which included the soundtrack featuring the Bee Gees. Stigwood followed that up with the musical Grease in 1978 and the big-screen version of Evita, starring Madonna, in 1996.

Composer Andrew Lloyd Webber tweeted Monday, “Farewell beloved Robert, the great showman who taught me so much. With love, ALW.”

Lyricist Tim Rice wrote, “Farewell to the extraordinary innovative generous #RobertStigwood. A vital part of my life…Thanks for so much, Robert.”

In his Facebook post, Spencer Gibb thanked Stigwood “for his kindness to me over the years as well as his mentorship to my family. ‘Stiggy’, you will be missed.”

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