Robin Williams mourned by his gorilla friend

The world’s most intelligent gorilla came close to tears after hearing of Robin Williams’ death.

The 63-year-old had been battling depression and took his life on Tuesday.

The famed gorilla, Koko, who can communicate in sign language, met Williams 13 years ago when he visited The Gorilla Foundation in California.

The pair became “very special friends”, according to staff at the foundation.