Legendary musical theater composer Andrew Lloyd Webber has been diagnosed with prostate cancer, according to the 61-year-old's spokesperson.

Webber -- who has composed 13 musicals and won seven Tony Awards -- began treatment this weekend in his native London for early stages of the disease.

"Andrew is now undergoing treatment and expects to be fully back at work before the end of the year," the spokesperson said in a statement on Sunday.

See which other stars have battled the disease.

The revered music man recently announced plans for a follow-up to his smash Broadway play Phantom of the Opera, now in its 21st year. The sequel, Love Never Dies, is scheduled to open in London next spring and on Broadway later next year.

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Lloyd Webber was knighted in 1992 and named to Britain's House of Lords in 1997. He has also won three Grammy Awards, a Golden Globe and an Oscar.

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