Chevy Chase thinks 'Saturday Night Live' is home to the worst humour ''in the world''.

The 74-year-old actor was once a key cast member of the iconic TV American show, but he feels 'Saturday Night Live' has been going downhill for decades.

Asked when he last found the show - which premiered in 1975 - to be amusing, he confessed: ''I'd have to say, that after the first two years, it went downhill.

''Why am I saying that? Because I was in it? I guess. That's a horrible thing to say. But certainly I never had more fun. I really loved it and enjoyed it. I didn't see the same fun thing happening to the cast the next year.''

Chevy was subsequently asked about specific skits of former cast members, including Will Ferrell's George W. Bush's impression.

He responded: ''Just not funny. Makes $25 million a picture.''

Chevy enjoyed Eddie Murphy's work on 'Saturday Night Live', though he wasn't impressed with his impression of Stevie Wonder.

He told the Washington Post newspaper: ''I thought Eddie Murphy was funny. Gumby. I found that funny and people loved that.

''Stevie Wonder, he did well. It's not that hard, for Christ's sake. Your skin's the same colour. You just put on some sunglasses and do this.''

Meanwhile, Chevy revealed he feels sorry for the viewers of the show's modern-day incarnation, admitting it drives him ''nuts''.

After being reminded that millions of people still watch the award-winning show, he explained: ''That means a whole generation of s**theads laughs at the worst f***ing humour in the world.

''You know what I mean? How could you dare give that generation worse s**t than they already have in their lives? It just drives me nuts.''