In the scene with the philatelist, he lists the stamps that he gave Jean-Louis in exchange for the stamps from the envelope. The last items are twelve Princess Grace Commemorative stamps which is likely a reference to Princess Grace of Monaco née Kelly. Grace Kelly only co-starred in one movie with Cary Grant (To Catch a Thief), but he later stated that she was his favorite leading lady, and they remained friends for many years. This may or may not be a deliberate Easter egg.

Film

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