Comedian/actor Billy Connolly hid his prostate cancer and Parkinson's disease from castmates on the set of new film What We Did On Our Holiday.

The Scottish funnyman, whose character in the film is a cancer patient, stunned cast and crew when they discovered his health problems when filming wrapped.

Connolly received his cancer and Parkinson's diagnosis on the same day in September last year (13).

Filmmaker Andy Hamilton tells Scottish newspaper Daily Record, "The timeline was such that we didn't know about Billy's health problems during the film. He was very stoic. I presumed there was stuff going on but that wasn't a problem for us, he just soldiered on and was very professional. It was only after we finished that he told us he was having the surgery for prostate cancer, which was a success, and we learned later about the diagnosis of Parkinson's. He did a brilliant job of making sure that it wasn't our problem. We were really impressed that he managed so well."

After filming was complete, Connolly had surgery in America, which he said was "in and out, done", and was given the all-clear in October this year (14).