Article continues below advertisementCharlie Sheen is rekindling a friendship with his '80s ex Dolly Fox following the release of his revealing memoir, The Book of Sheen.The two were spotted together on November 8 at the Hard Rock Hotel & Casino in Atlantic City, where Sheen showcased his Alive On Stage performance. According to a source who spoke with Page Six, the pair has "become really close again" since Sheen shared stories about their past romance in the book.Article continues below advertisementSource: MEGACharlie Sheen released his book 'The Book of Sheen' in September.