Billy Connolly has warned budding stand-up comedians about the dangers of alcohol and drugs in the industry.
The Big Yin told how he risked his own career by drinking too much after shows and advised young comics to steer clear.
Connolly, 79, who is suffering from Parkinson's disease, has launched online comedy masterclasses on the BBC Maestro service where he shares wisdom from his 50-year career.
