The evening was filled with singing and picture-taking as guests posed in a photo booth. Kiernan and her beau Christian Coppola even got a little cozy in a snapshot of them snuggling up together. "I love you," Kiernan wrote on Instagram, tagging the filmmaker. Another video captures one attendee telling the couple to make-out before Christian responds, "We're doing that later." Well, OK. Keep scrolling to see more pictures and clips from Kiernan's party!