A pair of conjoined twins marked a milestone Saturday: Ronnie and Donnie Galyon of Beavercreek, Ohio, surpassed the lifespan of the first known conjoined twins, Chang and Eng Bunker.

“Put it this way, I’m stoked,” Ronnie Gaylon told the Dayton Daily News.

The Gaylons are joined at the sternum. They celebrated their milestone -- turning 62 years, 8 months and 8 days old -- at a block party.

The Bunkers were born in Thailand and lived from 1811 to 1874.

“It’s a huge life event for them,” said younger brother Jim Galyon, who along with his wife Mary care for the twins in their renovated home.

“They weren’t even expected to live the first day, let alone get out of the hospital, let alone live 62 years,” Jim Galyon told ABC News. “This has been a lifelong goal, to meet and beat the Bunker twins. It means the world to them.”

Their next goal is to become the longest-lived conjoined twins, breaking the Guinness World Record of Giacomo and Giovanni Battista Tocci, who lived to 63. The Galyons turn 63 in October.

“It’s what me and Donnie’s always dreamed about, and we hope to get the ring, because we’ve dreamed about getting this since we were kids,” Ronnie Galyon said.

Reuters reported the twins performed in sideshows until they retired in 1991.

Here’s a YouTube video of the twins.