Michael Turchin and Lance Bass.Photo: Jeff Kravitz/getty

Michael Turchin and Lance Bass

Lance Bassis a dad times two!

The *NSYNC alum and husbandMichael Turchinwelcomed their first children, twins Violet Betty and Alexander James, via surrogate on Oct. 13, heannounced on InstagramThursday.

Violet was born at 17.5 inches long, weighing 4 lbs., 11 oz., while her brother was born at 18.5 inches long, weighing 4 lbs., 14 oz. Alexander was born one minute before his twin sis, at 1:24 p.m. on Wednesday.

Bass, 42, shared the exciting news alongside photos of the twins' birth certificates, which included stamps of their tiny footprints.

“We always knew we wanted at least two kids,” he said at the time. “It would be nice to have a boy and a girl just to feel the experiences of raising both or whatever they end up being. I think it’s just amazing that science has gotten this far where we can make the healthiest human beings ever. And I hope in our lifetime, we’ll be able to see the whole world be able to do this.”

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Lance Bass and Michael Turchin.Courtesy of Lance Bass

lance bass

Bass also shared that they are due “in early November,” though he said, “But I need them to get here before Halloween, because I need them to be Halloween babies. They have no choice but to love Halloween because I’m obsessed and they’re going to be obsessed.”

Turchin, 34, told PEOPLE at the time that he’s most looking forward to watching their kids develop a strong sibling bond.

“Just the fact that they’ll, I mean hopefully, like each other. I like my sister, we were best friends and that was the cool part growing up — I always had a best friend with me all the time,” he said. “I was never bored. That connection is super rare to have with a sibling when you’re that close. It’s just a really special relationship and I’m excited to see that play out with our kids.”

source: people.com