Once appeared in a Taiwanese beer commercial with Jackie Chan.
Studied Martial arts since the age of 7.
Worked as a stuntman in a few Hong Kong action films before establishing himself as an actor in his own right.
When he wasn't working in films in Hong Kong, he was a bouncer and bodyguard for visiting celebrities.
Middle name Majian, means "our lion" in Persian, named by his parents due to his star sign in Leo.
His name translates to King Lion, Shah is King in Persian and Lavi meaning Lion in Hebrew.
At the request of Director Betty Thomas, he lost 30 pounds to be the same size as Eddie Murphy in the boxing scenes for "I-Spy".
His sister is actress Elisabeth Shahlavi.
Is of Iranian-British descent.