A Passionate Woman is made by Rollem Productions and is adapted from Mellor's worldwide smash hit stage play.
Filming starts in Leeds this month and the drama will screen on BBC One next year.
But little does Betty know that some 30 years later, in Eighties Thatcherite Britain, her affair will implode on her beloved son Mark's wedding day.
Sue Johnston (The Turn Of The Screw, Waking The Dead), stars as Betty in the Eighties opposite Alun Armstrong (New Tricks) who plays her devoted, if dull, husband, Donald.
Polly Hill, BBC Commissioning Editor, Independent drama, England, adds:
"We are delighted that the script has attracted such a wonderful cast led by Billie Piper and Sue Johnston and we are sure it will prove a real treat for the audience."
(from BBC PRESS OFFICE)