Just what is it about the quietly sexy Gyllenhaal, 23? "Everyone had crushes on him – wardrobe, makeup, everybody," while filming 2002's Moonlight Mile, says costar Aleksia Landeau. "He's not like those actors who are like, 'Look at me!' He has a poetic soul. He lets people come to him." Adds Mile star Susan Sarandon: "He's gorgeous, he's smart – and he's thoughtful." Next up for the single L.A. native: Proof, with Gwyneth Paltrow and Anthony Hopkins, due in December.