All About Allie, Jazmyn, Jaxon and Bay

Justin Bieber is a big brother to three sisters and one brother.

Though the pop star’s parents, Jeremy Bieber and Pattie Mallette, split a few months after Justin was born in 1994, Jeremy went on to welcome two kids with his then-girlfriend Erin Wagner: a daughter, Jazmyn, and son, Jaxon. After Jeremy and Erin broke up, he then married Chelsey Bieber in 2018. Chelsey was already a mother to one daughter, Allie, and they welcomed their only child together, Bay, in 2018.

While Justin primarily lives in Los Angeles now, he has celebrated holidays together with his family and spent time in Canada, where they reside, which they’ve documented on social media.

When his siblings were little, Justin admitted he couldn’t resist spoiling them a little and showering them with gifts.

“When it comes to my little sister and brother, I spoil them,” Justin told AOL Music in December 2011. “With Jazzy, all she has to do is cry and she gets what she wants.”

From their childhoods growing up with a pop star as their older brother to their interests in their teen years, here’s everything to know about Justin Bieber’s siblings.

Allie Bieber, 17

Justin’s step-sister, Allie Bieber (née Rebelo), was born on April 7, 2007. She is Chelsey’s daughter from a previous relationship.

The 17-year-old appears close to her siblings and has even joined Justin in the studio. In 2020, she posted a snap of her, Justin, Jazmyn and Jaxon posing in a recording booth.

Justin also considers her to be one of his “favorite girls.” In December 2021, Justin shared a black-and-white selfie of him, his wife Hailey Bieber, and sisters Allie and Jazmyn, with the caption, “My favorite girlsss.”

Jazmyn Bieber, 16

Justin’s half-sister, Jazmyn Bieber, was born on May 30, 2008. She is the daughter of Jeremy and his ex Erin Wagner.

The singer was 14 years old when Jazmyn was born, and he has supported his little sister ever since. In May 2022, he gave a sweet shout-out to Jazmyn for her 14th birthday.

“Can’t believe im saying this but Happy 14th birthday to the sweetest, most beautiful, precious, little sis a brother could ask for !!” he wrote in the caption. “Love you @jazmynbieber.”

Jazmyn celebrated her 16th birthday in May 2024 with the launch of her first signature perfume, SweetSixteen. “Creating “SweetSixteen” has been a dream come true, and I can’t wait for you to experience it. 💫🌸 Imagine and Dream🍋,” she wrote alongside the Instagram announcement.

Jaxon Bieber, 14

Justin’s half-brother, Jaxon Bieber, was born on Nov. 20, 2009. He is the son of Jeremy and his ex, Wagner.

On social media, Jaxon likes to document travels with his family, his flair for fashion and his boxing sessions.

Jaxon is very close with Justin, who shared a sweet Instagram post for his birthday in November 2021.

“I sit here and look at all of these photos and I’m reminded of how much I love you my precious little bro. I am so proud of you,” Justin wrote. “I can’t believe you are 12 years old! You are such an amazing, sweet, handsome, special boy and I’m honored to be your big brother.”

In June 2023, Jaxon graduated from middle school, with his mom marking the special occasion on Instagram.

“When one door closes, another opens,” she wrote alongside photos of him from the special day. “Onto a new chapter and I’m so excited for this one! Happy graduation.”

Bay Bieber, 5

Justin’s half-sister, Bay Bieber, was born on Aug. 16, 2018. She is the only daughter of Jeremy and Chelsey.

Bay’s Instagram account, which is run by her parents, notes that she is a cheerleader, kid model and kid influencer.

In 2023, she celebrated her 5th birthday with a Barbie-themed party that was creatively called “Baybieb’s World.”

Chelsey shared photos from the event on Instagram, writing, “Pink looks good on us.” Justin’s mother Pattie commented on the post, “Omgosh how CUTE!!!”

The following September, Bay started kindergarten, and on a sign that listed some of her favorite things and what she wanted to be when she grew up (a princess at the time), she wrote that her favorite song was her big brother’s hit, “Baby.”