That was over 31 years ago in 1990.
Today he is 61, and has starred in 79 movies in total, 73 since Flatliners was released.
In Flatliners, I think Oliver Platt looks:
Flatliners scores 6.3 out of 10 on The Movie Database.
Oliver Platt's first acting role was as 'Ed Benitez' in Married to the Mob, released in 1988 when he was 28.