$1 million deal for book on Lindsay Lohan's rehab diaries?

Troubled actress Lindsay Lohan is reportedly set to sign a $1 million deal with HarperCollins to publish a memoir which is based on a diary she wrote during her rehab stint.

The 27-year-old Mean Girls star apparently kept a diary during her rehab stint in 2013 and that would be the base of the book, reported Aceshowbiz.

"It's more or less an autobiography, but she had a minimal number of sample pages. There was initial interest, but everybody backed off. There was concern she wouldn't deliver," a source said.

A representative for the publishing house however declined to comment.

Lohan's publicist Tej Herring, meanwhile, said that "there have been some conversations, but nothing official yet."