Short answers, pulled from the story.
West Side Story was created by Leonard Bernstein, Stephen Sondheim, and Arthur Laurents. Jerome Robbins approached Bernstein and Laurents in 1949 to collaborate on a contemporary adaptation of Romeo and Juliet.
The original Broadway production opened at the Winter Garden Theatre on the 26th of September 1957. The production closed on the 27th of June 1959 after running for 732 performances.
The 1961 film adaptation won ten Academy Awards including Best Picture. Rita Moreno became the first Latina actress ever to win an Oscar for her role as Anita.
The 1958 production transferred to London where it ran until June 1961 with a total of 1,039 performances. It opened at Her Majesty's Theatre in the West End on December 12.
Ivo van Hove directed the Broadway revival that officially opened on the 20th of February 2020. Anne Teresa De Keersmaeker provided choreography for this production which was produced by Scott Rudin, Barry Diller, and David Geffen.