“LPBW”'s Zach and Tori Roloff Celebrate Son Josiah's First Birthday with an Adorable Cake Smash: Watch (Exclusive)

Alongside Josiah, the couple is also parents to daughter Lilah, 4, and son Jackson, 6

Zach and Tori Roloff's son is turning one!

In an exclusive clip shared with PEOPLE ahead of tonight's episode of Little People, Big World, the proud parents celebrate their younger son Josiah's first birthday. Alongside their newly minted one-year-old, Zach and Tori are also parents to daughter Lilah, 4, and son Jackson, 6.

The two sit down together for a confessional as they begin discussing how their youngest is turning one.

“It’s crazy that Josiah’s already one,” Tori begins.

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Related: LPBW's Zach Roloff Is Hilariously Overwhelmed as He Gets Kids Ready in the Morning Without Wife Tori (Exclusive)

“Siah’s birthday went great. We had a lot of people a couple days ago,” Zach continues. “My mom and my dad and the family and Chris and a lot of friends from up here. But it was good. It was a good one year old party.”

Explaining that there are moments where she wishes life would "slow down" and others where she wants it to "speed up," Tori says that "overall it’s fun watching them grow.”

The scene switches to the outdoors, where the family of five is getting ready to watch Josiah eat his birthday cake.

“Ready? Hey Jackson, get behind Mama and get Si-Si to look at you,” Zach says as Tori picks up a camera to take a picture.

“Fix his hat. Turn it!” Tori says while Zach bends down to Josiah, who is wearing a straw hat, bandana, and denim overalls.

“Si-Si, are you ready to smash your cake?” Jackson adorably asks his brother, running around his parents.

In a confessional, Tori explains that first birthdays can be a lot of pressure.

"Giving them cake for the first time in front of a bunch of people doesn’t always go well,” Tori adds. “So yeah, we’re doing a cake smash today because I had a cute idea and I wanted to photograph him eating cake and having fun with it.”

The cake is placed on a stool in front of Josiah while Zach and Tori try to rally their older kids to stand behind them. Josiah then starts to eat his white cake, smushing it all over his face.

“Oh yes. He’s going for it. He’s like, see you later guys,” Tori says, laughing as she snaps his photo.

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