Mamie Gummer is engaged to Ben Walker

Meryl Streep’s daughter Mamie Gummer is engaged, US Magazine reports! Mamie (real name Mary Willa Gummer) has been dating boyfriend Ben Walker for about a year-and-a-half. They met while performing together in Broadway’s Dangerous Liasons. Walker proposed the old fashioned way by getting down on one knee and presenting her with an over-sized ring in…