Scarlett Johansson and fiance Romain Dauriac welcome baby girl Rose

Scarlett Johansson and her French journalist fiancé, Romain Dauriac, are officially parents!

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The 'Lucy' star gave birth to baby girl Rose on Sept. 4, 2014, with her rep confirming the news to the Associated Press today (Sept. 4) and sharing that "mother and daughter are doing well."

Scarlett and Romain have been dating since at least Nov. 2012, when they went public with their relationship. They announced their impending parenthood this past March, and were only spotted out and about (often hand in hand!) a few times since the announcement.

"There must exist a world in which I can balance those things, be able to raise a family and still make a film a year, or work on my own, develop things, do theater," the 29-year-old actress told the Wall Street Journal magazine earlier this year. "I want to be able to have it all. [Laughs] Selfishly."

Congratulations to the happy family!

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