That was over 6 years ago in 2015.
Today he is 52, and has starred in 55 movies in total, 8 since Lost River was released.
In Lost River, I think Ben Mendelsohn looks:
Lost River scores 5.8 out of 10 on The Movie Database.
Ben Mendelsohn's first acting role was as 'Peter' in The Still Point, released in 1986 when he was 17.