Anne Meara's husband Jerry Stiller and daughter Amy Stiller make cameo appearances at the wedding reception.
Sylvester Stallone was an extra in this film. He briefly appears as a groomsman in the wedding scene.
"For All We Know,' the Oscar-winning song from this film, as record by The Carpenters, reached #3 on Billboard's top 100.
The original Broadway production of "Lovers and Other Strangers", written by actors Renée Taylor and Joseph Bologna, opened on September 18, 1968, at the Brooks Atkinson Theatre and ran for seventy performances. Renée Taylor also performed in the stage play, and wrote the film's screenplay with David Zelag Goodman her husband Joseph Bologna.