The movie was adapted by John Michael Hayes and Charles Schnee from the 1935 novel by John O'Hara. It was directed by Daniel Mann.
It won the Academy Award for Best Actress (Elizabeth Taylor) and was nominated for Best Cinematography, Color.
The unusual spelling (capitalized "B" and "U") comes from the old way telephone numbers were listed in the United States - a modern number would use 2-8-8 rather than BUtterfield 8. A call girl by her very profession depends on the telephone for livelihood.