Sergey Tikhonov was contestant who appeared on episodes of O, Schastlivchik! on November 4, 1999, where he answered the 7th question wrong in classic format and won 1 000 rubles, and Kto khochet stat' millionerom? on July 27, 2013, answering the 7th question wrong in risk format and won 0 rubles. Sergey is one of a few contestants who appeared in two Russian versions when hosted by Dmitry Dibrov.