Posing nude for Playgirl is next for the 19-year-old father of Sarah Palin's grandchild. Johnston's attorney, Rex Butler, said Wednesday that a formal agreement has not been reached with the online magazine but adds it's a "foregone conclusion" it will happen.

Johnston fathered a child with Bristol, the 18-year-old daughter of Sarah Palin, the former Republican vice presidential candidate and former Alaska governor.

To get ready for his close-up, Johnston is training three hours a day, six nights a week at an Anchorage gym with a local body builder, Marvin Jones, a former Mr. Alaska competitor.

Playgirl spokesman Vincent Stevens could not immediately be reached for comment.
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