September 02, 2016 01:10 PM

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“The Hardest Thing” (and most exciting thing) Nick Lachey might ever have to do is be a dad to three kids!

Lachey and his wife Vanessa are expecting their child, the couple announced Friday in matching Instagram posts.

“We got a new crib! Now we need a new CRIB!” says the photo, which features the soon-to-be family of five in front of their new home — moved into just in time for the new arrival.

“Newest Lachey arriving Spring 2017,” completes the photo’s message, with a heart drawn around Vanessa’s baby belly.

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“#LacheyPartyOf5… and Wookie!” both Lachey, 42, and Vanessa captioned the shot.

The 98 Degrees frontman and his wife — who said “I Do” in 2011 — will welcome their newest family member this spring. The new baby will join big sister Brooklyn Elisabeth, 20 months, and brother Camden John, who turns 4 on Sept. 12.

And from the couple’s past comments about expanding their family, it sounds like three is the magic number.

RELATED VIDEO: Vanessa Lachey says Nick is “In love with everything Brooklyn does”

“We talked about three. I’ve always loved having a big family and truth be told, when I’m old and gray I’ll need a couple of them to take care of me!” Vanessa, 35, joked in 2013.

And it sounds like Lachey, who just wrapped the My2K Tour, was born to be a dad.

“I’m very excited to be a dad again,” Lachey told PEOPLE in 2014 before Brooklyn’s birth. “My dream in life has always been to have a family. It’s surreal when it starts to happen before your eyes.”

Jen Juneau

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