Warren Beatty 'slept with 12,775 women'

The new book on Warren Beatty (L), and his appearance in the 1975 film Shampoo. Photo / Supplied

Warren Beatty slept with 12,775 women over 35 years, according to a new book.

The Hollywood star - who married actress Annette Bening in March 1992 – reportedly averaged a different partner every day for the three-and-a-half decades he was single.

According to Peter Biskind, who has written a revealing biography on the legendary lothario entitled Star: How Warren Beatty Seduced America, Warren lost his virginity at 20 and seduced thousands of ladies.

The author made his estimate based on "simple arithmetic".

Biskind said: "There were 12,775 women, give or take – a figure that does not include daytime quickies, casual gropings, stolen kisses and so on."

It is also claimed the 72-year-old actor – who has been romantically linked to Natalie Wood, Diane Keaton and Madonna, among many others – proved too much for Joan Collins.

He wrote: "He made love to Joan Collins relentlessly. But for Collins it was too much of a good thing. One Sunday morning, exhausted, she stumbled out of bed.

"Dragging on a forbidden cigarette, she said, 'I don't think I can last much longer. He never stops – it must be all those vitamins. In a few years I'll be worn out.' "

- BANG! SHOWBIZ