JWoww, 32, told ABC News ahead of the show's premiere why they decided to return now.
"I think for us it was perfect timing because our kids were a little bit older [and] we're very secure in our relationships," she said.
Snooki, 30, chimed in with a laugh, saying, "Knock on wood."
"You see all the shows coming back like 'Will and Grace,' 'Roseanne' and we're like, 'Why don't we do a comeback?' Like, I feel like we were a big thing back then," Snooki continued.
The Situation added that the cast reunited because there "was a void in the TV game ... for probably about five years since we've been absent."
So, has adulting -- and motherhood -- changed Snooki or JWoww? It doesn't look like it.
Jenni agreed, saying: "Yeah, I had to live it up."
Guadagnino quipped, "You think young kids party hard? You should see moms that have been cooped up in a house."
"Jersey Shore" originally aired on MTV from December 2009 to December 2012. In this latest installment, the cast enjoys "a family vacation," Ortiz-Magro explained.
"Yeah, and that chemistry that you've seen from the other seasons of 'Jersey Shore' that didn't go away," Pauly D said. "It's still there."
The Situation agreed, saying, "It took that absence of time to make us miss each other and you'll see that."