Meryl Streep has revealed some very exciting baby news!

Meryl Streep announced some exciting baby news just yesterday - she is going to be a grandmother for the very first time! 

The Mama Mia star's oldest daughter Mamie Gummer is expecting a child with her fiancé Mehar Sethi, a representative confirmed. 

The couple announced their engagement during a holiday in Croatia earlier this year, with a simple picture on Instagram.

"My fiancé," he captioned the photo.

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Meryl is known to keep her family life to herself and we can imagine that her oldest daughter is going to follow in her mother's footsteps.

Congratulations Mamie and Mehar!