Bill Murray says working as a golf caddie was a ''great education''.

The 67-year-old actor and his five brothers - Brian Doyle-Murray, Joel, John, Edward and Andy - all worked carrying golf clubs and providing assistance during matches growing up in Chicago, and he says it taught him a lot about people.

Murray was speaking at the launch of his and his siblings' new restaurant Murray Bros. Caddyshack Restaurant at the Crowne Plaza Chicago O'Hare Hotel, which is inspired by the 1980 movie 'Caddyshack', in which Murray played groundskeeper Carl Spackle and his second eldest brother Brian, 72, had a supporting role as Lou Loomis.

Speaking a press conference at the new eatery on Tuesday (17.04.18), he said: ''For me it was a great education. Show up, keep up and shut up. Those were the three rules.

''I think it's a great experience. You learn a lot about people. It is a most informative education to be a caddy.''

The 'Lost in Translation' star expects the diner - which is their second restaurant following the opening of the first in St. Augustine, Florida, in 2001 - to do well not only because of the fascination with the game and the movie, but because of the impressive menu, which he quipped includes ''John Goodman-sized ribs''.

When Andy, 62, said they were ''literally Fred Flintstone size'', he joked: ''You mean John Goodman size?'' in a nod to his larger-than-life 'The Monuments Men' co-star.

Murray is proud that the diner uses paper straws to be environmentally-friendly after getting the advice of his son's marine biologist girlfriend.

He said: ''She says plastic straws are the worst thing in the world and it's everywhere and they don't really recycle.

''I hope none of you have stock in plastic straw companies, but there you go. Paper straws are spaghetti.''