Janet Leigh was 70 in Halloween H20: 20 Years Later when she played the character 'Norma Watson'.
That was over 26 years ago in 1998.
In 2004 she died aged 77, starring in 88 films in her career, 14 of those after Halloween H20: 20 Years Later was first released. If she were alive today she would be 96.
In Halloween H20: 20 Years Later, I think Janet Leigh looks: