Movie Trailer – Mama Mia! Posted by Rebecca Wright | Feb 4, 2008 | General Starring Meryl Streep, Pierce Brosnan, Colin Firth, Stellan Skarsgard, Julie Walters, Amanda Seyfried, Dominic Cooper, Christine Baranski. Based on the smash hit musical. Coming Summer 2008! Featuring the music of ’70’s super group ABBA.