Diane Keaton has died. And good heavens, how do you even BEGIN an appreciation of this Oscar winning icon’s career?

She came to fame as Woody Allen’s muse, enjoyed a career that lasted three full and fulfilling acts and lived long enough to see her “look,” the Diane Keaton “line” go in and out of fashion more than once.

A five decade career let her outgrow “Annie Hall” and “Sleeper” and come back around to the pre-cancelation Woody for “Manhattan Murder Mystery.”

She won one Oscar, copped a couple of Golden Globes, a BAFTA and an American Film Institute Lifetime Achievement award for movies that ranged from “Play It Again, Sam” to “Shoot the Moon,” “Mrs. Soffel” to “Reds” and “Looking for Mr. Goodbar” tossed in amongst the legions of comedies she made her own.

“First Wives Club?” “Somethings Gotta Give?” Two “Father of the Bride” comedies? She often starred opposite leading men years younger and generally outshone them, a Bette Davis or Joan Crawford with a sense of humor.

Her post-Allen career was probably the most interesting collection of roles, as she broke out with “Mr. Goodbar,” “Reds” and “Shoot the Moon” in short order. She might be the tall WASPy, flighty and funny shiksa goddess to Allen. But she was grand as career women (“”Amelia Earhart: The Final Flight,” “Baby Boom”), earthy but stylish and wise mothers (“The Family Stone,” “Father of the Bride”) and flirty and single over sixties (“Town and Country,” “Maybe I Do” and their many variations).

She had a persona and worked it, making every role hers with her signature timing, laugh and charisma.

“You know, somebody once said to me, ‘Funny is money,” she noted in one conversation we had. Diane Keaton was funny. She was money.

The last time I interviewed her was for “Mad Money,” I think, as she started the last act of her career — smaller films, most of them not profitable and not all that great. But she was bubbly through “Book Club” outings and sipping “Arthur’s Whisky,” and never less than adorable to watch on the screen.

“It’s hard to believe I’m still around, isn’t it?” she quipped back in 2007. She had 18 more years of movies yet to make. She passes away with three projects in the can and destined to come out as a final tribute.

Truly one of a kind.