Grey's Anatomy star Ellen Pompeo is officially a mom!

She and husband Chris Ivery welcomed their first child, a baby girl, on Tuesday, September 15! "Her name is Stella Luna Pompeo Ivery," the actress' rep said Wednesday.

Ellen Pompeo, who announced the pregnancy in April, is on maternity leave from Grey's Anatomy, although it remains unclear how many episodes she'll miss - if any.

Regardless, we're thrilled to hear Ellen's amazing news and look forward to seeing her back on the show, where she will play a huge role, transitional season or not.

Ellen Pompeo has become a mom!

Grey's Anatomy co-star Jessica Capshaw recently said Ellen will do fine as a parent:

"She is so excited, and very sweet. She is exactly the way that she should be about it, which is really excited and hopeful but at the same time really pragmatic."

Congratulations to Ellen Pompeo and Chris Ivery, who dated for several years before getting engaged in 2006 and married in 2007 - both on her birthday!

Here's a little photo tribute to the new parents ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.