Scottish funnyman Billy Connolly has been diagnosed with Parkinson's disease and has undergone treatment for prostate cancer.

The comedian/actor, 70, had cancer surgery in the U.S. and is also undergoing treatment for the "initial symptoms" of Parkinson's, according to his spokesperson.

Connolly has been told by doctors he will be able to continue working and his planned tour of New Zealand next year (14) is still scheduled to go ahead.

A statement posted on the star's official website reads, "Billy Connolly recently underwent minor surgery in America after being diagnosed with the very early stages of prostate cancer; the operation was a total success, and Billy is fully recovered.

"In addition Billy has been assessed as having the initial symptoms of Parkinson's disease, for which he is receiving the appropriate treatment.

"Billy has been assured by experts that the findings will in no way inhibit or affect his ability to work, and he will start filming a Tv series in the near future, as well as undertaking an extensive theatrical tour of New Zealand in the new year."