Kate Walsh Birthday Party @ Parc

Newlywed Kate Walsh celebrated her 40th birthday Saturday night at Parc with her hot young husband, Alex Young. When we asked her what she got for her 40th, she said "lots of looove!" You go, (old) girl!

Also celebrating her milestone were Private Practice and Grey's Anatomy co-stars Taye Diggs, Justin Chambers and Sara Ramirez.

Can you believe that woman is 40??? She looks amazing - for any age!