Sofia Coppola and Thomas Mars have welcomed their second daughter, according to People.
The couple, already parents to 3-year-old Romy, reportedly celebrated the arrival of baby Cosima "within the last month."
VIEW THE PHOTOS: Hollywood's Hottest Moms & Their Loveable Little Ones
The two announced the pregnancy news in December.
The couple are balancing parenting duties with their latest projects – Sofia's "Somewhere," which she wrote, directed and produced, is due in December, and will feature new music from Thomas and his band, Phoenix.
The "1901" rockers are spending July touring Europe before returning to the U.S. for select summer dates at Lollapalooza, the Hollywood Bowl and more.
U.S. & World
Copyright 2010 by NBC Universal, Inc. All rights reserved.
This material may not be published, broadcast, rewritten or redistributed.
Related Content from AccessHollywood.com:
VIEW THE PHOTOS: Behind The Lens: Hollywood's Directors
VIEW THE PHOTOS: Hollywood's Smokin' Hot Couples
PLAY IT NOW: Melissa Etheridge Chats About Walk Of Fame Induction & Family Life
PLAY IT NOW: Leonardo DiCaprio Talks 'Inception'
More from Access: [ Sofia Coppola Births Movies ]