That was over 32 years ago in 1989.
Today he is 40, and has starred in 26 movies in total, 23 since Uncle Buck was released.
In Uncle Buck, I think Macaulay Culkin looks:
Uncle Buck scores 6.7 out of 10 on The Movie Database.
Macaulay Culkin's first acting role was as 'Cy Blue Black' in Rocket Gibraltar, released in 1988 when he was 8.