The giant pumpkin that was the heavyweight champion at this year’s Topsfield Fair is also heavyweight champion of the world.

The 1,689-pound, world-record-smashing pumpkin, displayed for a week in the fair’s Fruits and Vegetable Building, will be immortalized in the Guinness Book of World Records.

Topsfield Fair winner Joe Jutras of North Scituate, R.I., as well as two other growers of 1,600-pound pumpkins, will be on ABC’s “Good Morning America” on Monday, Oct. 29, said Sally O’Maley, the fair’s spokeswoman.

It’s just the second time the fair has weighed a world-record holder.

“I have been competing for a while,” Jutras said of the fair’s All New England Giant Pumpkin Weigh-Off, “and it was something I always wanted to win.”

“We are very excited,” said his wife, Susan Jutras. “He’s worked very hard, so he deserves it.”

The pumpkin has been touted as a world-record holder since it was weighed in the Arena on Sept. 29, but Jutras had to wait to see what might crop up at other weigh-offs in the United States and Canada.

Jutras managed to fend off a challenge from Donald Young of Des Moines, Iowa, who grew a 1,662-pounder, just 27 pounds shy of Jutras’ giant. Dan and Jason McKie of Gasport, N.Y., grew one to 1,631.5 pounds, the third largest pumpkin ever grown.

At the Topsfield Fair, Jutras beat out Bill Rodonis of Litchfield, N.H.

Rodonis held the world-record title with a 1,566-pound pumpkin until Jutras had his weighed a short time later, O’Maley said.

For Jutras to qualify for the world record, the fair’s general manager, James O’Brien, had to verify for Guinness that he witnessed the competition, one of the oldest and most prestigious among growers, and that it fell within the guidelines of a proper giant pumpkin weigh-off, O’Maley said

The 24th annual contest has come a long way over the years, she said.

For instance, in 1986 Don Fleming grew a winning 530-pounder, O’Maley said, and in 1989, Wayne Hackney grew one weighing 614 pounds. The cutoff to enter is 350 pounds.

As recently as 2000, the fair was offering $10,000 to the first 1,000-pound entry weighed at the fair.

Last year, a fellow Ocean State giant-pumpkin grower, Ron Wallace, broke the fair’s record with a 1,347-pounder.