Peter Gallagher was 43 in House on Haunted Hill when he played the character 'Donald W. Blackburn, M.D.'.
That was over 25 years ago in 1999.
Today he is 68, and has starred in 85 movies in total, 40 of those since House on Haunted Hill was released.
In House on Haunted Hill, I think Peter Gallagher looks: