ENTERTAINMENT
08/25/2010 05:12 am ET | Updated May 25, 2011

Sofia Coppola & Thomas Mars Welcome Baby Cosima

Phoenix frontman Thomas Mars is quickly becoming outnumbered at home -- he and director Sofia Coppola recently welcomed a second baby girl, a source confirms to PEOPLE.

Daughter Cosima was born in New York City "within the last month" and joins big sister Romy, 3½.

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