It was re-unveiled May 18, 1979, in 1,248 theatres in the United States and Canada (except for the New York City space, where it opened a 7 days later on), Paramount's most important ever saturation release at the time, grossing $4.5 million in its opening weekend. Grease was at first unveiled in the United States on June 16, 1978, and was an rapid box-business results. Variety. June 28, 1978. p. Daily Variety. May 9, 1979. p.