Zac-Shelly Brown, Colin Hanks-Samantha Bryant welcome baby girls

More Hollywood babies! We can hardly keep up.

Zac Brown, of the eponymous country band, has announced on his website that he and wife Shelly welcomed baby girl Joni Mason, weighing 7 lbs 14 oz, Wednesday morning (Feb. 2). She was born at the couple's Atlanta, Ga.-area home. Wow, at-home birth -- hardcore.

Joni joins her three older sisters -- Justice, 4, Lucy, 2, and Georgia, 1 -- but Zac recently told The Boot they are going to keep trying until they have a boy. He's no stranger to big families, as he is one of 12 children.

Across the country in Hollywood, actor Colin Hanks and wife Samantha Bryant welcomed a baby girl Olivia Jane on Tuesday (Feb. 1), reports People. This is actor Tom Hanks first grandchild, so congratulations to Grandpa Tom. Colin, 33, and Samantha, a formerly New York-based publicist, were married in May 2010. This is the first child for both.

Congratulations to all the happy families!