Alexander Lennart Steen is a Swedish former professional ice hockey player and executive who currently serves as general manager of the St. Louis Blues of the National Hockey League (NHL). He was drafted 24th overall by the Toronto Maple Leafs in the 2002 NHL entry draft, and started his NHL career with Toronto. He was traded to the Blues in 2008, where he played the remainder of his career, winning the Stanley Cup in 2019. Steen succeeded Doug Armstrong as general manager of the Blues after the 2025–26 season.