[1] In the West, Kolokolnikov is best known for his performance as Styr in the television series Game of Thrones[2] and as Gennadi Bystrov in The Americans.

[citation needed] Almost immediately after his arrival in Moscow, he went to study at film school and became involved with the production of shows for children.

Soon afterwards, his father took him to audition for the director Savva Kulish, where Kolokolnikov gained a small role in the film Iron Curtain.

[citation needed] At 15 years old, he passed external exams for the last two classes of high school and submitted his documents to the Boris Shchukin Theatre Institute.

Kolokolnikov met with director Kirill Serebrennikov, who invited him for a role in the television series Diary of a Killer in the staging of Sweet Bird of Youth at the theater Sovremennik Theatre.