Watch Jazz Boy full movie online Movies123. Watch Jazz Boy 123movies online for free. Jazz Boy 123Movies: The rich young man Teddy Anker invests his money in the theater at the beginning of the 1920s. Whatever he does becomes a success. He falls in love with a dancer, Karin. He decides to put up a show with Karin as the leading lady, but for the first time one of his shows becomes an economic disaster.