Julianne and her brother, Derek, who were both on hand to celebrate Their Emmy **minations, also goofed around for photographers before heading inside. "I couldn't be happier for them," Derek told People on the red carpet. "I knew that it was happening within the first month they were dating. It was one of those things where it was instant and that smile and glow she's had hasn't dimmed ever since she met [him]. That's a special thing." Keep reading to see more of the cute couple, then check out more of the biggest celebrity engagement rings.