Summer is almost here, and it's not just temps that are heating up. Hollywood's hottest will be sizzling on the big screen, and the TV Guide Network has scoop on the sexiest movie stars to look for, all season long. Making the list are Katherine Heigl and Jeffrey Dean Morgan, who will give audiences a double-dose of heat in their respective upcoming films, The Ugly Truth and Taking Woodstock. Both actors became household names as ill-fated Grey's Anatomy lovers, Izzie and Denny — a story line that one TV Guide Network expert muses gave Morgan "an all-access pass to women."  Do you agree? Check out our video below and weigh in. (Summer's Sexiest Movie Stars airs Sunday, May 24, 8 pm/ET)