By peoplestaff225
Updated November 06, 2009 03:30 PM

On the evening of November 4th, celeb moms came out in force to support Stella McCartney‘s fab new line for GapKids and babyGap (see our review here).

Hosted by actress Liv Tyler and 4 ½-year-old son Milo, the party also celebrated the opening of the Stella McCartney for GapKids Pop-Up Store (left) on Robertson Boulevard in Los Angeles, which is now open to the public until November 28th.

Other celeb guests included Amber Valletta with son Auden, Jennifer Meyer Maguire with children Ruby and Otis, Constance Zimmer with daughter Colette and new mom Marley Shelton.

Moms and their little ones shopped for outfits while dining on mini veggie burger bites, grilled cheese, ice cream sandwiches and sprinkle cupcakes. There were also face painters and balloon artists to entertain the kids.

The super cute collection is now in stores and online and it’s selling out fast.

Stella shared some thoughts on her new line. “It’s really exciting for us to do a boys and girls collection with Gap for the first time. I think it has a mix of the playful and practical.”

We’ll post our exclusive chats with Liv, Constance and Marley in the coming days. Check back!