Pregnant Grace Gummer expecting first baby with Mark Ronson.

Grace Gummer and Mark Ronson are expecting their 1st baby.

instagram@gracejgummer_

Pregnant Grace Gummer expecting first baby with Mark Ronson.

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Meryl Streep is about to become a grandmother once again.

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On Tuesday at W Magazine's 50th anniversary party in NYC, Gummer showed off her bump while wearing a Michael Kors collection.

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Grace Gummer and Mark Ronson celebrated their first wedding anniversary in August.

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It is learned from the source that Mark Ronson always wanted to be a father.

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Ronson and Gummer were seen wearing tan suits and a pink turtleneck.

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Oscar winner Meryl Streep's little daughter Gummer is seen with a baby bump while sitting.

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Grace Gummer and Mark Ronson are expecting their 1st baby.