Diane Keaton is the proud owner of a gorgeous, Cape Cod-style estate in the Pacific Palisades.

The Father of the Bride actress bought the 7,800 square-foot mansion for $5.6 million.

Keaton's new three-story home features six bedrooms, nine bathrooms, stunning pool, two wet bars and an ocean-view rooftop deck.

Sounds like the 66-year-old actress will be living large ... and lovin' it!

See Diane's exquisite spread in our gallery below.