Hilary Duff, Mike Comrie: Friendly Exes

Hilary Duff and Mike Comrie may be divorced, but the bitterness that triggered it seems on the surface to be all but gone.

Hilary and Mike took their son, Luca, Sunday on a stroll through Bev Hills, and they looked like the best of friends ... touching and even kissing.

Friends after divorce ... it's going around.