David Walliams will star in a BBC six-part series set in the 1950s, Partners in Crime, an adaptation of two Christie books featuring married sleuths Tommy and Tuppence, The Secret Adversary and N or M.
There will also be new three-part adaptation of And Then There Were None, Christie’s most successful work which has sold more than 100m copies.
Adapted by Sarah Phelps, it will be the centrepiece of the BBC Christmas schedule in 2015.
“It is our ambition for Tommy and Tuppence to finally take their rightful place alongside Poirot and Marple as iconic Agatha Christie characters,” said Walliams. “They are among Christie’s very best work.”
There will also be documentaries about the author.