Introducing Grandma Meryl
The iconic film star's daughter, actress Mamie Gummer gave birth to a baby boy, Us Weekly reported on Thursday
The family's new addition is the first grandchild for Streep, 69, and here husband Don Gummer
News of 35-year-old Mamie's pregnancy was confirmed in December. The "True Detective" star has been engaged to Sethi Mehar since August
Mamie and Streep starred alongside each other in the mother-daughter flick "Rickie and The Flash," in 2015.
The "Mama Mia!" and don share three other children; Henry Wolfe Gummer, 39; Grace Gummer, 32, and Louisa Gummer, 27.
A rep for Gummer didn’t immediately respond to our request for comment.