Alexander Ross Winter is a British and American actor. He played the slacker Bill S. Preston Esq. in the 1989 film Bill & Ted's Excellent Adventure and its sequels Bill & Ted's Bogus Journey (1991) and Bill & Ted Face the Music (2020). He is also known for his role as Marko in the 1987 vampire film The Lost Boys; for co-writing, co-directing, and starring in the 1993 film Freaked; and for directing documentaries in the 2010s.

Bill & Ted's Excellent Adventure is a 1989 American science fiction comedy film directed by Stephen Herek and written by Chris Matheson and Ed Solomon. The first installment of the Bill & Ted franchise, it stars Keanu Reeves, Alex Winter and George Carlin. It follows Bill (Winter) and Ted (Reeves), who travel through time to assemble historical figures for their high school history presentation.