The twin sisters - who won back-to-back Olympic gold medals in rowing at Athens and Beijing - will visit the Upper Clutha A and P show next year as part of their ambassadorial role for New Zealand Meat and Lamb.
The rowing sisters will be "celebrity" judges for the Glammies Award 2009.
The "Glammies" are the national Golden Lamb Awards, which go to the sheep farmers producing the tastiest lamb cuts, as decided by a panel of judges.
The awards take place for the third year running at the Upper Clutha A and P Show.
Previous "celebrity" judges include Prime Minister John Key and V8 race car driver and four-time Bathurst winner Greg Murphy.
To win the "Glammies", sheep farmers from around the country each enter a lamb leg to be analysed on tenderness and yield at Lincoln University before being taste-tested by chefs and the celebrity judges.
