Boris Kirillov was born in 1992. He had participated in World Aquatics Championships. During Third Islamic Solidarity Games back in 2013 which was held in Palembang, Indonesia. Boris Kirillov finished 200m backstroke event in a time of 2 minutes 04,98 sec. This was the record-time not only for Boris, but also for Azerbaijan. In December 2013 at European Championships in Denmark Kirillov set national record for the third time during 100m backstroke event in a time of 55,33 sec.