Kristin Scott Thomas and James McAvoy's actress wife Anne-Marie Duff will star as John Lennon's aunt and mother in a story of the late beatle's early life.
British actor Aaron Johnson, 18, will portray Lennon in the screenplay about the star's teenage years.
Thomas will play the rocker's aunt Mimi, who raised the star when his parents split up.
Duff is set to portray his mother Julia in the Matt Greenhalgh screenplay, titled Lennon, which is based on a book by the Beatle's half-sister, Julia Baird.