Watch This: Trailers for Mamma Mia! Here We Go Again 3 Comments / Movies / By Virginia DeBolt / January 30, 2018 / Amanda Seyfried, Cher, Christine Baranski, Colin Firth, Dominic Cooper, Julie Walters, Lily James, Mamma Mia!, Meryl Streep, Momma Mia! Here We Go Again, Ol Parker, Pierce Brosnan, Stellan Skarsgard, trailers Trailers are showing up for the July release of Mamma Mia! Here We Go Again. Here’s a spot from the Grammys and a regular release trailer.