I Am Number Four's Alex Pettyfer made his US talk show debut today on The Ellen DeGeneres Show to chat about his new film and how much he enjoyed working with his costar, Glee's Dianna Agron. The duo are also a couple in real life, though Alex played it coy when Ellen asked about their romantic status. Ellen did, however, get Alex to remove his button-down and show off his impressive abs. Alex is a relative newcomer to the scene in Hollywood, but we always love a good shirtless sighting. So, tell us what you think of Alex's ab-bearing moment — totally hot or not really your thing?