Hailey Bieber's Son Made an Adorable Cameo in Her Halloween Roundup

Call her, beep her, if you want to reach her.

Halloween may have been yesterday, but Hailey Bieber is keeping the spooky season vibes high with her latest post. Yesterday, she shared a TikTok with her pal Kendall Jenner recreating the always-iconic promo shot from The Simple Life starring Paris Hilton and Nicole Richie—but today, her latest Instagram was more of a family affair. Bieber's new post shows her posing alongside her husband Justin and the couple's new baby, Jack. Hailey was dressed as Kim Possible and Justin was her sidekick, Ron Stoppable. He held little Jack in his arms as they posed together.

The other shots in Hailey's roundup showed more costumes, a loaf of Rhode-branded bread, a shot of sushi, and another Halloween image for good measure.

"October things ✅✅😌," Hailey captioned the carousel.

Yesterday, Hailey shared the very first shot of Jack since sharing a photo of his feet for a birth announcement. In the Story post, Hailey encouraged everyone to vote in the upcoming U.S. elections on November 5. Today's post also showed little Jack's feet, only instead of a magenta onesie, he was wearing a very appropriately seasonal The Nightmare Before Christmas-print outfit.

According to E! News, Jack arrived on August 22 and his proud parents shared the news the next day.

"I was honestly able to keep it quiet because I stayed small for a long time," Hailey said of her pregnancy in an interview with W Magazine. "I didn’t have a belly, really, until I was six months pregnant, which was when I announced it. I was able to wear big jackets and stuff."