Renée Adorée's love interest in this film, Owen Moore, was in real life her former brother-in-law. She was married to Owen's brother Tom Moore from 1921 to 1924.
As a teenager during the World War I years, Renée Adorée performed in working class London nightclubs like the one depicted in this film.
The end credits have a dedication to "Hugh M. Hefner". Hugh Marston Hefner of Playboy fame was born in 1926- the same year as The Blackbird's release.