Reese Witherspoon Beams Alongside Cameron Diaz on First Night Out Post-Baby

USMagazine, Saturday, October 27, 2012, 8:30am (PDT)

Reese is ready to party!

Reese Witherspoon has been out and about in the daylight hours -- running errands, cheering on son Deacon's soccer game -- since welcoming son Tennessee James Sept. 27.

But the evening of Friday Oct. 26 marked the Devil's Knot star's first official night out since becoming a mom for the third time. Clad in a blue shift dress and ankle booties, the 37-year-old was among the bevy of A-listers on hand for the opening of Rag and Bone's new flagship store in Los Angeles.

PHOTOS: Reese's pregnancy style

Sans husband Jim Toth, Witherspoon had a gal pal to lean on: Cameron Diaz, wearing head-to-toe Rag and Bone, with her hair pooled back into a messy ponytail.

PHOTOS: Reese's body evolution

Witherspoon and Diaz -- both pals to Rag and Bone designers David Neville and Marcus Wainwright, not to mention Gwyneth Paltrow and Chelsea Handler -- were all smiles as they sipped champagne and caught up at the bash.

PHOTOS: Reese's style through the years

Other star at the bash include Emma Roberts and boyfriend Evan Peters (American Horror Story: Asylum), Mad Men's Kiernan Shipka, Mandy Moore, Vogue's Anna Wintour and daughter Bee Schaffer, Brittany Snow and Aziz Ansari.

This article originally appeared on Usmagazine.com: Reese Witherspoon Beams Alongside Cameron Diaz on First Night Out Post-Baby