That was over 15 years ago in 2006.
Today he is 82, and has starred in 97 movies in total, 37 since Flushed Away was released.
In Flushed Away, I think Ian McKellen looks:
Flushed Away scores 6 out of 10 on The Movie Database.
Ian McKellen's first acting role was as 'Roger' in Alfred the Great, released in 1969 when he was 30.