The photograph of Harris Shaw and his wife, that we see on his bedside near the end of the movie, is a real photo of Michael Caine and his wife Shakira Baksh.
Sir Michael Caine has said that this film is likely to be his last film.
Best Sellers reunites Scott Pilgrim vs. the World (2010) actors Aubrey Plaza and Ellen Wong, who would reprise the voices of their Scott Pilgrim characters two years later in Scott Pilgrim Takes Off (2023).