Mac MacArthur

Mac MacArthur is the second tritagonist in the 1998 Christmas film, Jack Frost. He is played by Mark Addy. He is Jack's best friend and vocalist player of the Jack Frost band. He becomes a father figure to Charlie after the band was dismantled due to Jack being killed in a car accident. By the end of the film, he is now married to Gabby and is seen playing the piano.