Minnie Driver: Engaged to Her Baby Daddy?

Minnie Driver sported a ring on her engagement finger when spotted at the beach with her dog Bubba and her ready-to-pop belly on Wednesday. 

It was just a simple green stone and gold band...so nothing too suspicious...but enough to suggest the possibility of a wedding with Minnie's still-unnamed baby daddy.

Or  perhaps it's just a promise ring...those are very 'in' these days.  Just ask Lindsay Lohan.