Hallmark continues to ramp up its holiday movie lineup.star Heather Hemmens and Hallmark regular Luke Macfarlane will headline Hallmark Movies & Mysteries' upcoming music-centric Christmas film, ET can exclusively reveal. Sheryl Lee Ralph will also star.Hemmens plays Beth, a concert violinist who recently lost her mom, while Macfarlane portrays Sean, a country music star still grieving his wife's death.