The company has a long and distinguished history of serving royalty, as well as stars and celebities. One Prince of Wales hailed Cartier as "Joaillier des Rois, Roi des Joailliers" (Jeweller to Kings, King of Jewellers"). Cartier received an order for 27 tiaras for the coronation of the future King. King Edward VII was crowned in 1902 and in 1904 he honoured the Company with the Royal warrant of supplier to the Royal Court of England. Similar warrants soon followed from the courts of Spain, Portugal, Russia, Siam, Greece, Serbia, Belgium, Romania, Egypt and finally Albania, and also from the House of Orleans and the Principality of Monaco.

Cartier is at present the no. 1 seller of luxury jewellery in the world, and the no. 2 seller of luxury watches (after Rolex).