John Campbell McTiernan, Jr. (born January 8, 1951) is an American filmmaker, best known for his action films and most identifiable with the three films he directed back-to-back: Predator, Die Hard, and The Hunt for Red October alongside cult favorite Die Hard With A Vengeance, and Last Action Hero. More recently, McTiernan was in the news for his criminal conviction in the Anthony Pellicano wiretapping scandal.

McTiernan was born in Albany, New York and attended the Juilliard School before graduating M.F.A. from the AFI Conservatory.

On April 3 2006, McTiernan was charged in federal court with lying to the FBI during a phone call to McTiernan's home in the wiretapping investigation involving Anthony Pellicano. He was arraigned and pleaded guilty on April 17, 2006, and is the 14th person charged in this case.