Joanna Lumley is learning to rap - and her teacher is none other than will.i.am.
Joanna confessed she was "fascinated" by Will during a BBC One documentary following his rise to fame.
The 67-year-old actress travelled to Will's mansion in Los Angeles, where she met his friends and family, returned to his childhood home, and even had a go at making music with him.
Speaking to The Sun newspaper, Joanna said: "I have long been fascinated by will.i.am and leapt at the chance of meeting him and finding out more about his extraordinary life and achievements.
"He was everything I had hoped he'd be, and more: Charming, articulate, a whirlwind of ambition and talent, as sweet as pie and dandy as a peacock.
"The film we made together is truly a rare thing -- a side of will.i.am the public hasn't seen yet, with interviews with friends, family and colleagues."
The 60-minute documentary will air early next year.
Emma Willis, Head of Documentary Commissioning for the BBC, said: "We're absolutely delighted to be welcoming Joanna Lumley back to factual television on the BBC. Joanna is one of Britain's most popular personalities and will bring warmth and insight to this unique documentary."
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