Mark Pellegrino was 26 in Lethal Weapon 3 when he played the character 'Billy Phelps'.
That was over 32 years ago in 1992.
Today he is 59, and has starred in 52 movies in total, 43 of those since Lethal Weapon 3 was released.
In Lethal Weapon 3, I think Mark Pellegrino looks: