“Princess Bride ”star Mandy Patinkin calls Rob Reiner's killing an 'unthinkable tragedy': 'What is happening to our world?'

Cary Elwes and Fred Savage, who also starred in the 1987 swashbuckling comedy, paid tribute to Reiner on social media.

Filmmaker Rob Reiner and his wife found dead at Brentwood home of apparent homicide

The director and actor is known for his films "When Harry Met Sally...," "Stand by Me," "The Princess Bride," "This Is Spinal ...