Mamma Mia 2: Lily James will play young Meryl Streep in Here We Go Again!

The War & Peace actor will play 'young Donna'

It’s full steam ahead with the sequel to Mamma Mia, Lily James — recently seen in Edgar Wright’s Baby Driver — having been cast as ‘young Donna’, according to The Hollywood Reporter.

For Mamma Mia fans, that name should be immediately familiar as Meryl Streep played Donna in the original; the British icon will return for the sequel, which will feature multiple flashbacks explaining how the various characters' relationships were forged.

James has a proven track-record singing on the big screen, having performed "A Dream Is a Wish Your Heart Makes" for 2015's Cinderella.

The actor became a well-known Hollywood name after playing the Disney live-action film’s titular character. She also starred in the BBC adaptation of War & Peace.

Titled Mamma Mia: Here We Go Again!, the sequel sees Pierce Brosnan, Amanda Seyfried, Christine Baranski and Colin Firth all return to sing more ABBA songs.

The Best Exotic Marigold Hotel scribe Ol Parker will write and direct Here We Go Again!, which currently has a release date set for 20 July 2018.