In 1984, Green portrayed Carl "Alfalfa" Switzer in the Jell-O Gelatin Pops commercials featuring "The Little Rascals". In 1991, Green rose to fame in a Rally's "Cha Ching" commercial, which earned him an appearance at a New Orleans Saints game. Green was given a key to New Orleans in honor of his role in the popular commercial. Green appeared in the horror TV series "It" (as Richie Tozier, age 12) and "Ticks", all three "Austin Powers" movies (as Dr. Evil's son, Scott), and "Enemy of the State" and "The Italian Job" (as a computer specialist in both). He was also in the films "Can't Hardly Wait", "Rat Race", "", "Without a Paddle" (alongside "Matthew Lillard"), "Idle Hands", "Party Monster", "Airborne", and "Old Dogs". Green also had a role in the series "Buffy the Vampire Slayer".