Semen Altov (January 17, 1945) was celebrity contestant, who appeared with Arkady Inin on an episode of Kto khochet stat' millionerom? on October 9, 2010 in classic format, took the money and won 200,000 rubles.
In risk format on August 18, 2012 he appeared with Irina Medvedeva, with who have chosen 100,000 rubles as minimum amount, answered the 12th question wrong and won them. On April 13, 2013 Semen appeared with Galina Danilova. They have chosen 200,000 rubles as minimum amount, answered the 13th question wrong, lost 200,000 rubles and won them. On March 21, 2015 he appeared with Viktor Koklyushkin. They also have chosen 200,000 rubles as minimum amount, answered the 12th question wrong and won them again. On June 10, 2017 and February 24, 2018 he appeared with Valery Syutkin, with who have 200,000 as minimum amount in third time, but in this time they answered the 11th question wrong and walked away nothing, but in second time took the moey and won 400,000 rubles. On October 3, 2020 he appeared with Mikhail Boyarsky, with who have chosen 200,000 rubles as safety net, but answered the 10th question wrong and walked away with nothing.