Nikola Đuričko was 8 in What Is with You, Nina? when he played the character 'Boris'.
That was over 40 years ago in 1984.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 49, and has starred in 48 movies in total, 44 of those since What Is with You, Nina? was released.
In What Is with You, Nina?, I think Nikola Đuričko looks: