Ellen Pompeo and Chris Ivery

Big sis Meredith is joining Little Grey in the family way — in real life. Ellen Pompeo and her husband, music producer Christopher Ivery, are expecting their first child together, People reports.

"It's great news," says her rep. "They're ecstatic."

Pompeo, who wed Ivery in 2007, is the second expectant Grey's Anatomy doc at Seattle Grace: On-screen sister Chyler Leigh is due May 15 with her third child, a daughter to be named Aniston Kay.

Leigh's pregnancy was not written into the show, and there is no word yet on whether Pompeo's will be incorporated.

What do you think? Should MerDer start a family ASAP? Or would a McBaby ruin the show?