Popsugar Entertainment Mamma Mia 2 Mamma Mia! Here We Go Again New Cast Members See the Original Mamma Mia! Cast and Their Younger Selves, Side by Side 17 July 2018 by Kelsie Gibson View On One Page Photo 6 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Lily James and Meryl Streep as Donna The 29-year-old Baby Driver actress will be stepping into the iconic role of Donna. Previous Next Start Slideshow Mamma Mia 2MoviesMamma Mia