Drew posted a selfie with her girlfriends, also including Cameron's sister-in-law Nicole Richie, on social media, revealing the group had a recent bonding experience, reported Us magazine.
Dressed up in winter woollens, the girls all look cold but happy as they smile for the camera.
The actress added the caption: "#peopleilove hold onto those you love and climb a mountain together.
"The women in my life are doers. That can be anything from life, work and physical capability. Zest if you will. I follow my friends. And when I am most in need, I hold on tighter. But it is when they need me... I know I have done something right. To earn their trust."