Nope. Ivan is married to Tanya Sergei. The couple were married in 2003. The above answer is NOT true... I spent an evening with him in 2004. He could be closeted or he was just slumming for an evening...
he married his first cousin Natalya Satin
he is straight. he was married to a girl named tanya.
Sergei Sage's birth name is Sergei Luzginov.
Sergei Chigrakov's birth name is Sergei Chigrakov.
Sergei Kozlovsky's birth name is Kozlovsky, Sergei Vasilyevich.
Sergei Krupennikov's birth name is Sergei Ivanovitch Krupennikov.
Sergei Krikalev's birth name is Krikalev, Sergei Konstantinovich.
Sergei Kudimov's birth name is Sergei Vladimirovitch Kudimov.
Sergei Kurilov's birth name is Kurilov, Sergei Ivanovich.
Sergei Kuryokhin's birth name is Kuryokhin, Sergei Anatolyevich.
Sergei Machilsky's birth name is Machilsky, Sergei Aleksandrovich.