Fast Facts

  • The eldest daughter of Meryl Streep.
  • Named after her maternal great-grandmother; has been called Mamie since she was an infant.
  • As a toddler, made her movie debut in the 1986 comedy-drama Heartburn.
  • Cast in the 2005 off-Broadway production of Mr. Marmalade; received a Theatre World Award for her performance. 
  • Made her small-screen debut in the 2008 HBO series John Adams.  
  • In 2008, won the role of Cécile Volanges in the stage adaptation of Les Liaisons Dangereuses; it marked her Broadway debut.  
  • Spokesmodel for fashion designer Gerard Darel's 2009-10 collection.


  • Meryl Streep — Mother
  • Louisa Jacobson Gummer — Sister
  • Grace Gummer — Sister
  • Henry Gummer — Brother
  • Benjamin Walker — Husband (separated)
  • Donald J. Gummer — Father
  • Mary Streep — Grandmother


  • Northwestern University, Evanston, Illinois, United States (BA in Theatre, 2005); attended the British American Drama Academy, London, England


  • Birth Name: Mary Willa Gummer
  • Birth Place: New York, New York, United States
  • Profession: Actor

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