Michael Nyqvist was 57 in Kursk when he played the character 'Nesterov'.
That was over 6 years ago in 2018.
In 2017 he died aged just 56, starring in 70 films in his career, 1 of those after Kursk was first released. If he were alive today he would be 63.
In Kursk, I think Michael Nyqvist looks: