Robert Stack was 22 in To Be or Not to Be when he played the character 'Lieut. Stanislav Sobinski'.
That was over 82 years ago in 1942.
In 2003 he died aged 84, starring in 69 films in his career, 62 of those after To Be or Not to Be was first released. If he were alive today he would be 105.
In To Be or Not to Be, I think Robert Stack looks: