Oh, you want to know who plays the lead roles in "A Christmas Melody"?! Well, I'm glad you asked! The main characters are Melissa Joan Hart as Mariah and Adrien Brody as Kevin. They're a divorced couple trying to co-parent their son Charlie during the holiday season. And guess what? I'm in the movie too! I play a snowman named Patch who has some very wise words about the true meaning of Christmas.