The movie features at least eight cast members from The Sopranos (1999): Tony Sirico, John Ventimiglia, Aida Turturro, Vincent Pastore, Joseph R. Gannascoli, Frank Pellegrino, Burt Young, and Tony Darrow.
This movie was produced by Elizabeth Hurley, Hugh Grant's girlfriend at that time. They had a production company together, called Simian Films.
During filming, James Caan nicknamed Hugh Grant "Whippy" after the Whippet, an English breed of dog that shivers a lot.
The music at the wedding reception is the same music as the wedding reception in The Godfather.
The house where Uncle Vito (Burt Young) hosts Michael and Gena's engagement party is the same house that was filmed in Rocky IV (1985). Burt Young co-starred in Rocky IV (1985) as Rocky's brother-in-law Paulie.