Possible Clues:

• Affectedly pretentious young man and woman
• Artsy-fartsy, say
• Russian car carrying detective's superior
• Posh boy advanced to embrace princess
• "Well aren't you fancy!"
• 8 young man married to Gilbert's royal daughter
• “Well, aren’t we special!”
• The French female performed, actress primarily trying to be posh?
• Posh car carries old princess
• Posh boy, wildcat every now and again