And Jackson makes three! Well, plus the doggies...

On Tuesday afternoon Charlize Theron and Sean Penn took her adorable son to the beach in Malibu, and from playing in the ocean to hugging and kissing on the beach, it looks like everyone had a blast.

The Oscar winners have only been dating for a few months, so clearly they're still in the honeymoon phase ... then again, they've been friends for a long time, so as far as Hollywood couples go, it looks like these two could be in it for the long haul!