Alexander Ross Winter (born July 17, 1965) is a British-American actor, film director, and screenwriter, best known for his role as "Bill S. Preston, Esq." in the 1989 film Bill & Ted's Excellent Adventure, its 1991 sequel Bill & Ted's Bogus Journey, and a planned sequel Bill & Ted Face the Music. He is also known for his role as Marko in the 1987 vampire film The Lost Boys; co-writing, co-directing, and starring in the 1993 film Freaked; and directing documentaries in the 2010s.
Winter was born in London, England, to a family of Jewish background. His mother is Gregg Mayer, a New York-born American and former Martha Graham dancer who founded a modern-dance company in London in the mid-1960s, and his father is Ross Albert Winter, an Australian who danced with Winter's mother's troupe. Winter received training in dance as a child. He has an older brother named Stephen.
When Winter was five, his family moved to Missouri, where his father ran the Mid-American Dance Company, while his mother taught dance at Washington University in St. Louis. The two divorced in 1973.