The co-creator of US hit TV show Glee thought he was being "punked" when a fan note arrived from Sir Paul McCartney.
But a shocked Ryan Murphy discovered that the ex-Beatle really was an admirer of the Fox show - and wanted his music to be part of it.
Sir Paul enclosed a mix of some of his tunes, including Michelle, and asked Ryan to consider using them on the series about high school misfits in a glee club.
"I was gobsmacked. I grew up with that guy. So, of course, we are going to do something," he told the Television Critics Association's summer meeting in Beverly Hills, California.
And Sir Paul won't be the only British name associated with Glee when it returns next season.
Ryan said Britain's Got Talent discovery Susan Boyle was in talks to be part of the Christmas episode.
Another hour will feature the songs of Britney Spears, and the show is wooing a "major" artist for a tribute episode to be shown after the Super Bowl next year.
Glee, which combines pop songs, high school high jinks and drama into an upbeat hour, is the leading nominee at the Emmy Awards on August 29 with 19 nods, including best comedy series and seven acting nominations for its cast and guest stars.
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