Charles Albert "Babe" Siebert was a Canadian professional ice hockey player. A left winger and defenceman, he played 14 seasons in the National Hockey League (NHL) for the Montreal Maroons, New York Rangers, Boston Bruins and Montreal Canadiens. He won the 1926 Stanley Cup championship with the Maroons, and was a member of the famous "S Line", and another with the Rangers in 1933.