Hollywood icon Elizabeth Taylor's darkest despair!

A blockbuster book about Elizabeth Taylor reveals a long-ago suicide attempt she made over actor Richard Burton.

The legendary screen star tried to take her life by downing a handful of the powerful sleeping pill Seconal, according to a   book by William J. Mann, How to Be a Movie Star: Elizabeth Taylor in Hollywood.

"The sleeping pills nearly killed her," divulged the source.

The incident occurred when Liz first fell for Burton on the set of  Cleopatra.

At the time, she was married to her fourth husband, actor Eddie Fisher.

"When Richard Burton called off their secret love affair in 1961 while she was the biggest star in the world, Liz attempted suicide," the source said.

"Drunk and depressed, taking pills was her way of throwing a tantrum.

"And it almost took her life!"