We have an official statement on the passing of Irvin Kershner straight from George Lucas:
The world has lost a great director and one of the most genuine people I’ve had the pleasure of knowing. Irvin Kershner was a true gentleman in every sense of the word. When I think of Kersh, I think of his warmth, his thoughtfulness and his talent. I knew him from USC – I attended his lectures and he was actually on the festival panel that gave the prize to my THX short. I considered him a mentor.
Following Star Wars, I knew one thing for sure: I didn’t want to direct the second movie myself. I needed someone I could trust, someone I really admired and whose work had maturity and humor. That was Kersh all over. I didn’t want Empire to turn into just another sequel, another episode in a series of space adventures. I was trying to build something, and I knew Kersh was the guy to help me do it. He brought so much to the table. I am truly grateful to him.
He was a friend as well as a colleague. He will be missed.