Aitana Sánchez-Gijón was 16 in Romanza final (Gayarre) when she played the character 'Alicia'.
That was over 38 years ago in 1986.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 55, and has starred in 60 movies in total, 59 of those since Romanza final (Gayarre) was released.
In Romanza final (Gayarre), I think Aitana Sánchez-Gijón looks: