Trivia

His first on-screen kiss was with Kirsten Dunst in Pequeños guerreros (1998).

His first gig was at the age of 14 months when he was in a Tide commercial.

He began acting seriously at the age of 6.

His hobbies are acting, rock climbing, soccer, rollerblading, and photography.

His father, Maurice Smith, is English-born (from London), and his mother, Terrea (Oster), is American-born (from California). Gregory has English, Ashkenazi Jewish, and small amounts of Dutch, German, Swedish, and Norwegian, ancestry.

Dual citizen of the U.S. and Canada.

Has two younger brothers, Andrew and Douglas, and a younger sister, Samantha.

During the making of American Outlaws (2001) Smith, the youngest of the cast, got the nickname 'Secret Weapon' from the wranglers, for his rare talent to handle guns.

Older brother of Douglas Smith, son of Terra Smith and Maurice Smith.

Has two other siblings named Andrew and Samantha.

Is allergic to cats.

His parents separated when he was 12 years old

He broke his collar bone while skiing.

Father of son, Harry Edward and daughter, Primrose Elizabeth.