Mamie Gummer: Mamie Gummer. Actress: The Lifeguard. Mamie Gummer was born on 3 August 1983 in New York City, New York, USA. She is an actress, known for The Lifeguard (2013), Ricki and the Flash (2015) and The Ward (2010). She has been married to Mehar Sethi since February 2019. They have two children. She was previously married to Benjamin Walker.
