Biografía

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.

There was a period when I became disillusioned with the politics of what goes on in show business. My mom had missed a lot of her childhood, so I figured it would be a good time to hang up my acting shoes . . . I was probably reading too much J.D. Salinger at the time.

Guns are evil! And very little good comes from the availability of a bullet designed to kill human beings!

When I am working it is up early and coffee and 15 hours of being on the set. When I am not working, it is up late and coffee, golf or softball and hopefully a ball game on the television.

There is a healthy fraternal rivalry, but nothing serious and we both have been looking for a project to do together. I guess he may direct me in a project some day.

And it is easy to believe you are not good enough if you listen to everybody else.