i watched (name of the movie!) it was so fun to watch. Your acting was so good!!" (Let's say the movie's title was 아가씨) => 나 아가씨 봤는데 너무 재미있더라. 네 연기 너무 좋았어! (informally to a friend) => 저 아가씨 봤는데 너무 재미있네요. 연기 참 잘하셨어요? (polite)

영화 잘 보고있어요. 너무 재미있게 봤어요. 연기 너무 잘 했어요. Trans: I watched your movie. It was really fun/interesting to watch. Your acting was great!