According to Tom Shales’ review in The Washington Post, “The Rat Pack” was directed by Rob Cohen and was released on HBO. Per IMDb, Liotta’s co-stars included Don Cheadle and Joe Mantegna. The film centers on the tumultuous lives and relationships of the synonymous Rat Pack (via Film Affinity). Biography reports that this group consisted of Sinatra, Dean Martin, Sammy Davis Jr., and Peter Lawford. In 2021, People writes, Liotta was a guest on “Jay Leno’s Garage.” During the interview, Liotta revealed that Sinatra’s daughters, Tina and Nancy, had sent him a fake horse head in the mail.
As the New York Post explains, this was a reference to a scene in “The Godfather” (as seen on YouTube). NME states Liotta told Leno that he had been approached by Tina and Nancy to star in a miniseries they were creating on Sinatra. However, he declined and said that it “felt too uncomfortable.” Sometime after, Liotta agreed to do “The Rat Pack ” and the sisters sent the horse head as a response (per People). They were unhappy he had chosen to do another project instead of their own. As Liotta put it, “a horse’s head means you’re toast.”