Elvis Presley was the love of her life, a relationship that lasted until the day he died, according to Ann-Margret. That's the most sizzling revelation in the 52-year-old screen siren's autobiography, "Ann-Margret: My Story," written with the assistance of celebrity biographer Todd Gold and scheduled to be published in March by Putnam.

According to an inside publishing source, Ann-Margret says she met Elvis on the set of "Viva Las Vegas" in 1963 and "carried on an affair with him through the '60s which she knew was doomed from the start because Elvis was promised to someone else" - Priscilla Presley, although Ann-Margret doesn't name her.Ann-Margret says Elvis' affection for her continued into the 1970s, and he sent her red roses arranged in the shape of a guitar on every one of her opening nights. The book says the only one he missed was her Las Vegas opening Aug. 16, 1977 - the day he died.