Miley Cyrus walked the Grammys red carpet with her mom and dad last night leaving many wondering about the whereabouts of her new hubby Liam Hemsworth. Well, one thing for sure is that the couple isn't having troubles. Instead, his Isn't It Romantic co-star Rebel Wilson reports that he's sick. A rep for Hemsworth also told People magazine that Liam wasn't well and had to miss a press stop for his upcoming movie. The illness, while not life-threatening, is unknown.