Meet world's oldest conjoined twins at 63

Ronnie and Donnie Galyon are the world's oldest conjoined twins at 63.

The Galyon twins, of Ohio, unofficially reached the milestone the day after they turned 63 on Oct. 28.

They beat out the previous record held for more than seven decades by Giacomo and Giovanni Battista Tocci, who were born in Italy in 1877 and lived to be 63.

Though the twins are yet to receive their official certificate from the Guinness World Records confirming they're the longest-living conjoined twins in history, they're living as if they're already first place.They celebrated that milestone with a block party in their hometown of Beavercreek, just outside of Dayton.

Ronnie and Donnie are joined at the waist and face each other. They have four arms and four legs and separate hearts and stomachs but share a lower digestive tract, a groin, a rectum and penis, over which Donnie has control.

The twins were left conjoined when experts said they could not guarantee both babies would survive an operation to part them after their birth..

More photos after the cut...