Today in 2009, A Little Night Music opened at the Walter Kerr Theatre, where it ran for 425 performances. A Little Night Music is a musical with music and lyrics by Stephen Sondheim and book by Hugh Wheeler. Inspired by the Ingmar Bergman film Smiles of a Summer Night, it involves the romantic lives of several couples. Since its original 1973 Broadway production, the musical has enjoyed professional productions in the West End, by opera companies, in a 2009 Broadway revival, and elsewhere, and it is a popular choice for regional groups. It was adapted for film in 1977, with Harold Prince directing and Elizabeth Taylor, Len Cariou, Lesley-Anne Down and Diana Rigg starring.