If It's Tuesday, This Must Be Belgium (1969)

This cute 1969 comedy following various characters on an eighteen day bus trip from London to Rome features two terrific performances by Ian McShane and Suzanne Pleshette, as well as a host of co-stars and a great deal of celebrity cameos. Among the cameos is Catherine Spaak, who plays a pretty girl Marty Ingels has his picture taken with on the street.