This movie came in $2 million below its budget. Co-producer Rhonda Tollefson credits this to producer Sir Sean Connery's thrifty Scottish ways. Connery drove his own car instead of hiring a driver, and flew on commercial planes instead of using private ones so that all of the money would show up on-screen.
Catherine Zeta-Jones performed most (some sources say all) of the climbing and gymnastics in the rafters, during the "I stole the Rembrandt" sequence at Mac's castle.
The building used for exterior shots of Mac's safe house (Castle Duart on the Isle of Mull) was the ancestral home of the chief of the Clan MacLean, which is the maiden name of Sir Sean Connery's mother.
This was Sir Sean Connery's last role as a romantic lead in a movie. He did several more movies after this, but they were all character roles.
Sir Sean Connery is thirty-nine years older than Catherine Zeta-Jones.