That was over 18 years ago in 2003.
Today he is 45, and has starred in 47 movies in total, 34 since 28 Days Later was released.
In 28 Days Later, I think Cillian Murphy looks:
28 Days Later scores 7.1 out of 10 on The Movie Database.
Cillian Murphy's first acting role was as 'Pat the Barman' in Sweety Barrett, released in 1998 when he was 22.