How old were Harry Potter's parents when Voldemort killed them?
James Potter, born 27 March 1960, died 31 October 1981
Lily Potter, born 30 January 1960, died 31 October 1981
The last enemy that shall be destroyed is death.
And as seen in the HP and Deathly Hallows, Part II film
For the record, the actors that portrayed them in the films were born in 1967 (Geraldine Somerville) and 1958 (Adrian Rawlins), making them 34 and 43 at the time of filming Harry Potter and the Philosopher's Stone, almost twice the supposed age of their characters. No explanation is given for their aged appearance.