HOLLYWOOD star Diane Keaton was Woody Allenâ€™s girlfriend and co-star in the 1970s â€“ which is when she scooped a best actress Oscar for her role in his movie, Annie Hall.
She has two adopted children â€“ daughter Dexter, 17, and son Duke, aged 12.
Her latest comedy, The Big Wedding, is tipped to be a summer blockbuster.
She told GARTH PEARCE what she wishes sheâ€™d known at 18.
â€œAT 18, I spent too long worrying and obsessing over men.
I think it might have been a problem of my generation, growing up in the 1950s.
You were â€œpickedâ€ by a man. You were â€œchosenâ€.
You canâ€™t imagine that attitude today â€” or, at least, I hope you canâ€™t.
I wanted to marry Al Pacino. But even if I had got what I wanted, I doubt it would have been a happy marriage. I really loved him. The first time I met him was in The Godfather movie (released in 1972, when she was 26) and I worked with him again in The Godfather Part II (1974). I gave him an ultimatum to marry me.
I love men. But I think my expectations are pretty much diminished in that area. I also wish I had understood bulimia.
I lived a big lie, eating a large amount of food in public, throwing up in private and still fitting in to tiny dresses.
This was happening in my 20s. I did not have a structure, like college life or marriage. I never quite knew what to do or how to deal with it.
Did I tell anyone at the time? Absolutely not.
I had emotional problems, which were the bane of my existence.
As much as I was very lucky to be so successful and be part of these films, I donâ€™t think I was curious enough about how they were made. I had therapy because I suffered from low self-esteem. I wish I had realised you have to get smart and get healthy.
Even when I was with Warren Beatty, I never thought he would stick around. My mother, Dorothy, was wonderful and I wish I could have appreciated her more.
When I was younger I always thought about her helping me get what I wanted for myself. She gave me the chance to dream. In a certain sense, she was the love of my life.
She had so much vitality and energy. That is why my book â€” Then Again: A Memoir. published in 2011 â€” was a tribute.
Why did I wait so late to have children? I didnâ€™t think about it. I wasnâ€™t ready.
A former lover said to me: â€œYou are a very late developer.â€ I was young when he said it, but he hit the nail on the head. I have always been conscious about age. I remember when I was 30, it was supposed to be a big deal â€” but people forgot my birthday and I didnâ€™t make anything of it.
With my 60th, I did not know what to do, so I just thought a lot about time. I knew that I had to cherish every single minute from that point onwards.
Life takes on a different flavour with age. It is a much deeper experience and more satisfying. It is also more exciting and interesting.
When I adopted my children, I had to become more of a giving person.
And I had never been like that. I had been completely self-involved. I am an actress, after all!
Hollywood afforded me opportunity. But how do you want to take it? Do you want to be a big movie star and do whatever it takes to be a big movie star?
I have had opportunities, but did not really want the attention so much.
When I was linked with Keanu Reeves after the film Somethingâ€™s Gotta Give (2003) it was one of the most hilarious things I had read in my life.
I wish I could say that there WAS a link and I was flattered that anyone would even think of us as an item.
My life is full, but not full of romantic love. I do not feel sad about that.