• Justin and Hailey Bieber celebrate their First Halloween as Parents
  • The young couple enjoy Halloween with their son
  • They share a picture with their newborn

Justin and Hailey Bieber recently marked a significant milestone by celebrating their first Halloween as parents. The beloved couple took to Instagram to share their festive spirit, showcasing their family-themed costumes that delighted fans worldwide. Justin, known for his hit "Baby," and his wife Hailey, embraced characters from the iconic Disney Channel show 'Kim Possible,' bringing a nostalgic touch to their celebration.

A nostalgic costume choice

The couple's choice of costumes was both charming and nostalgic. Justin, 30, and Hailey, 27, transformed into "Ron" and "Kim Possible," while their newborn son, Jack Blues, adorably took on the role of Rufus, "Ron's" pet naked mole rat. In the Instagram photos shared on November 1st, Justin is seen cradling Jack, who is dressed in a cute pink onesie, while Hailey completes the look with a red wig, black T-shirt, and cargo pants.

Hailey Bieber had previously shared a glimpse of their son on social media. In late October, she posted the first photo of Jack Blues since his birth announcement in August. The image captured Jack in a baby carrier, with his tiny feet peeking out. Hailey added a playful touch, adorning one of Jack's feet with an "I Voted" sticker and captioning the photo, "Happy Halloween! Get out there and vote ."

A joyous announcement

The couple's journey into parenthood began in August when Justin announced the arrival of their son with a heartfelt Instagram post. "WELCOME HOME JACK BLUES BIEBER," he wrote, sharing a black-and-white photo of the newborn's tiny foot. Hailey quickly re-shared the image, adding the baby's name along with a teddy bear and blue heart emoji.

The Biebers have continued a cherished family tradition by naming their son with the initials 'JB,' a practice that spans generations in Justin's family. This tradition includes Justin himself, his father Jeremy Bieber, and several of his siblings, creating a meaningful connection across the family tree.

Parenthood bliss

According to sources close to the couple, becoming parents has been a dream come true for Justin and Hailey. "The pregnancy was something that they very much wished and prayed for," a source revealed to 'PEOPLE.' "The day they found out that Hailey was pregnant, was the best ever for Justin." The source added, "He was over the moon with excitement. It was a big celebration for them."

The couple's joy and love for their son are palpable. "The baby is such a miracle. He's adorable and doing well. Hailey's doing well too," the source shared, emphasizing the happiness and fulfillment that Jack Blues has brought into their lives.

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