Former England rugby star Lawrence Dallaglio has launched a Greene King competition for a pub lover to create a cask beer to go on sale across the country.
Entrants to 'Brew us a Flavour' will be asked to choose the aroma, taste, colour and alcoholic content of their beer.
The winner will then get to make the ale at the Suffolk brewery, choose a name and see it go on sale at pubs throughout Britain from October 20.
Dallaglio, who launched the competition at the Wheatsheaf in Fulham, London, this week, recently created his own beer with Greene King - Dallaglio's Heroes.
He said: "It was fantastic to be involved in the creation of my very own beer and it is a real thrill to be able to walk into a local pub and order a pint of Dallaglio's Heroes at the bar.
"'Brew Us a Flavour' is a great opportunity for the nation's would be brewers and I wish them luck!"
Greene King head brewer John Bexon said: "The nation is full of beer drinkers with strong views on the flavour and taste of beer and what constitutes a great pint.
"What they might not be so familiar with are the ingredients and brewing process. This is the chance for a lucky winner to learn about what's involved as well as to see their name on bars throughout the country."
Entry forms will be available in hundreds of Greene King pubs throughout July.