Officials at the SAG-AFTRA labour union decided to dedicate the organisation's new screening room in New York to the Good Will Hunting star, and the Robin Williams Center For Entertainment And Media was officially opened in the Big Apple this week.

Billy and Whoopi were joined by Good Morning, Vietnam director Barry Levinson, and the tragic comedian's movie co-stars Hank Azaria and Bonnie Hunt, for the inauguration, which also featured a panel discussion to reminisce about their old friend.

The stars recalled Robin's spirit and generosity, and Whoopi remembered how her "big brother" would always make her and Billy laugh until their cheeks hurt.

"He could exhaust you. Billy and I would both say, 'Just stop! Oh my god...!'" she smiled, before remarking on his qualities as a close friend: "He would always check on you to make sure you were OK. And that made you learn to check on him."

Williams committed suicide in August, 2014 at the age of 63.

An autopsy discovered the actor had Diffuse Lewy Body Dementia, also known as Dementia with Lewy bodies (DLB), which causes hallucinations, motor skills issues, and a fluctuating mental state, symptoms that may have contributed to the depression he had been suffering.