Bertram Wagstaff Mills (August 1873 – April 16, 1938) was a British circus owner who ran the Bertram Mills Circus. Originally from Paddington, London, his circus became famous in the UK for its Christmas shows at Olympia in West London. The circus occupied the Christmas season at Olympia from 1920 until 1967, with a brief hiatus for the war years. In 1967, rising costs made it prohibitive for the circus to continue. The end of an era had come and the Bertram Mills Circus closed for business.