Seth Rogen kept his fiancée Lauren Miller close as they hit the red carpet at tonight's premiere of The Green Hornet in LA. Cameron Diaz looked sexy and tan in a tight red dress at the screening, but Lauren had her own eye-catching accessory on her left hand. Her diamond engagement ring stood out against her pink number as she posed with her real-life leading man. Seth popped the question in September and shared his embarrassing nudity-filled proposal story on Conan a few months back. He has a long week of promotional duties ahead of The Green Hornet's release on Friday, and luckily he has his proud partner by his side for his big night.