A Pair of Sixes, originally titled The Party of the Second Part, is a farce in three acts by Edward Peple that made its Broadway debut at the Longacre Theatre on March 17, 1914. The piece was produced by Harry Frazee and achieved a run of two hundred and twenty-seven performances at the Longacre before closing in the third week of September 1914.

The Longacre Theatre is a Broadway theater at 220 West 48th Street in the Theater District of Midtown Manhattan in New York City, United States. Opened in 1913, it was designed by Henry B. Herts and was named for Longacre Square, now known as Times Square. The Longacre has 1,077 seats and is operated by The Shubert Organization. Both the facade and the auditorium's interior are New York City designated landmarks.