Steven Tyler cut the umbilical cord of his grandson -Sailor Gene - who was born to his daughter Liv Tyler in February of this year.

Liv dished during an appearance on Jimmy Kimmel Live!, saying that her dad showed up to the hospital where she was rushed in after going in to labor six weeks early.

"He kinda walked in just before everything happened," she began.

"Never in a million years would I have thought I'd give birth with my dad and my sister, but it was actually really sweet because . . . we were laughing a lot."

She adds that she took a picture of her dad cutting the cord and "it's like all the doctors, and everything is really very hygienic, and his hand just looks insane kinda in there with his long black claws, the painted black stripe in the middle — his skull rings."