X17 EXCLUSIVE - Gwyneth Paltrow And Cameron Diaz Do A Girls-Only Dinner Date

Who knew they were friends?!

Gwyneth Paltrow and Cameron Diaz dined at Giorgio Baldi in Santa Monica Wednesday night -- the same spot where Gwyneth and estranged hubby Chris Martin shared an evening just after they consciously uncoupled.

Cameron was wearing a simple white tee with jeans with a gray cardigan, ripped jeans and a Chloe cross-body bag while Gwyn sported a cream-colored jacket, a thick gold-chain necklace and baggy pants. Both wore their hair in simple top knots.

As Cameron promotes her film Sex Tape and takes her relationship with Benji Madden public and Gwyneth endures almost daily headlines about Martin going on dates with 30 year-old Alexa Chung and the ease with which he's "moved on," it's clear the pair certainly had a lot to talk about.

Our photographer tells us Cam and Gwyn arrived around 7:30 and stayed until 10! Gwyn reportedly gave up on her macrobiotic ways and dug into some of Baldi's delicious pasta, while Cameron encouraged Gwyn to share a desert, too. We're told, "They had a great time together -- Cameron was really animated, telling stories and gesturing all the time. She's really funny. Gwyneth looked like she was due for a good laugh. She was relaxed and enjoying the evening. Seems like she needed a good girls' night out!"

After the meal, Gwyneth gave the waiter a kiss and drove just a mile away to her Brentwood home in her black Audi, while Cameron pulled away in her environmentally-conscious Tesla.

We hope we see these 41 year-olds together again ... what a cute pair!