The Grey’s Anatomy cast has been shaken up a lot in recent weeks, but things have returned to normal as Ellen Pompeo and Katherine Heigl returned to work on the show this week.

“They’re back at work and everyone’s happy to see them,” says a source.

Pompeo, who welcomed her first child, Stella Luna Pompeo Ivery on September 15, won’t be absent from any episodes, thanks to the production team’s planning and pre-taping.

After adopting 10-month-old baby Naleigh on September 10 - and taking five weeks off to film the romantic comedy Life As We Know It - Heigl also returned to the set this week.

Heigl’s character, Izzie Stevens, will return to Seattle Grace in the episode airing November 12, the same episode where guest star Kim Raver will begin her stint on the show.

Ellen Pompeo just had a baby, while Katherine Heigl just adopted one.

No word on whether or not Stella and Naleigh have come to work with their moms yet, but if Chyler Leigh’s experience with five-month-old Anniston is any indication, they’re welcome.

“My trailer is overtaken by kid stuff. Anniston has a chair, diapers, wipes, formula, toys,” Leigh said. “Justin [Chambers] crowned [Anniston] baby Elvis because of her mohawk!”

Chyler's baby, born this summer, was her third.

One thing is for sure - soon Anniston, Naleigh and Stella will have a new playmate: Eric Dane and his wife Rebecca Gayheart are expecting their first child together next year.

Talk about a family-friendly set!

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