Levi Johnston to pose nude for 'Playgirl'

Levi Johnston, who is the father of Alaska governor Sarah Palin's grandchild, has signed a deal to pose in the nude for Playgirl magazine.

Johnston, 19, had come into prominence after it was revealed that Palin's 17-year-old unmarried daughter Bristol was pregnant with his baby.

His attorney, Rex Butler, revealed a formal agreement has not yet been reached with Playgirl, an online magazine, but the photographic shoot is a "foregone conclusion" and the pictures would be published by the end of the year.

Johnston has been preparing for it by training three hours a day, six nights a week in Anchorage, Alaska with Marvin Jones, a former Mr Alaska competitor.

"We told him he would have to do what actors and actresses do. They get in the gym," the Telegraph quoted Butler as saying.

However he did not reveal how much Johnston would be paid.