Absolutely Fabulous star Joanna Lumley will play the Queen in a TV version of David Walliams' bestselling children's book Gangsta Granny.
She is joined in the cast for the hour-long BBC One special by Miranda Hart, Rob Brydon, Julia McKenzie and David himself.
Miss Marple star Julia plays the dull pensioner with a secret past as a jewel thief who gets her grandson, played by Reece Buttery, tangled up in one last heist, with David and Miranda playing his ballroom dancing-obsessed parents.
David said: "I am thrilled that we have such a stellar cast of comedy legends for Gangsta Granny. I can only apologise that I am in it too."
Filming starts on Sunday with the show set for broadcast at Christmas.
Gangsta Granny was David's fourth children's book. First published in 2011 it has sold almost half a million copies.
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