That was over 28 years ago in 1993.
Today he is 61, and has starred in 79 movies in total, 66 since Indecent Proposal was released.
In Indecent Proposal, I think Oliver Platt looks:
Indecent Proposal scores 5.8 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.