Best of 2011

2011's Hollywood Baby Bonanza!

From Harper Beckham to Flynn Bloom, meet the newest – and cutest – arrivals of the year

SEPTEMBER

The Mad Men cast celebrated the Sept. 13 arrival of January Jones's son Xander during his first onset visit at 4 weeks old. While the single mom has been mum about her first child's father, Melanie Brown happily shared her baby news – the arrival of her third child Madison on Sept. 1 with husband Stephen Belafonte – with the Twitterverse. "Stephen nearly passed out, Phoenix screamed, I laughed so hard the baby popped out!!!" she Tweeted.

Also born this month: Jenna Fischer's son, Weston, and Emily Deschanel's son, Henry.