Where Joe (George Burns) is looking through his old photos and other memorabilia, he looks at a photo of a young couple, presumably Joe and his wife, and it makes him start to cry. The photo is actually a picture of Burns and his real (late) wife and legendary stage partner Gracie Allen.
Although the three actors portrayed seniors of approximately the same age, their ages--from oldest to youngest--spanned over 20 years. When the film was made, George Burns (born 1896) was eighty-three; Lee Strasberg (born 1901) was seventy-eight; while Art Carney (born 1918) was only sixty-one-years-old.
Tito Goya, the actor who plays the Gypsy Cab Driver, was arrested in 1985 for allegedly committing a murder in 1979, the year this film was produced. He died of a liver ailment before the charges ever went to trial.
The trio use Groucho Marx disguises in the robbery. George Burns knew Groucho, though they were frequently mad at each other.
Upon meeting the then 27-year old director Martin Brest for the first time, George Burns remarked that he had "neckties older than him."