Wissenswertes

Son of Patty Duke and John Astin.

Younger half-brother of actor Sean Astin.

Lost the top part of his right ear in a car accident.

Dominic Monaghan was his roommate for a while. Mackenzie later made a guest appearance on Dominic's TV show, Lost (2004).

Has three other half siblings: David, Allen and Ashley.

He and his brother, Sean Astin, both guest-starred in Season 9 of Navy CIS (2003). Mackenzie was in the episode, Life Before His Eyes (2012), and Sean was in The Tell (2012).

Was accepted to Johns Hopkins University, but did not enroll.

Uncle of actress Ali Astin, Elizabeth Louise Astin and Isabella Louise Astin.

Writes, makes and stars in his own Super 8 films.

He is of English, Irish, Scottish, and German descent.

Nephew of Ray Duke.

Brother-in-law of producer Christine Astin.