Reese Witherspoon Jon Favreau jeans pants

Reese Witherspoon Jon Favreau jeans pants

Guess they're definitely still a couple (even though they hid from the cameras all night!) - after all, we just saw them together with the kids in Santa Monica on Friday!

Anyway, Robert Downey, Jr. had a birthday par-tay (he's now 44) at Bond St. in the Thompson Hotel last night and the guest list included Gwyneth and hubby Chris, Reese Witherspoon (pictured above) and Jake and, of course, Iron Man director Jon Favreau...

Gwyneth goes out solo so much of the time, we were almost certain she and Chris were over, but not yet, apparently!