Reign Disick and Kourtney Kardashian, Justin BieberJon Kopaloff/FilmMagic for ABA;XNY/Star Max/GC Images/Getty Images(2)

Kourtney Kardashian’s son Reign Disick clapped back at rumors claiming that his dad is Justin Bieber and not Scott Disick.

Reign, 10, was taken aback by the conspiracy theory that Bieber, 31, could be his father during an Instagram Live posted by stepsister Alabama Barker’s boyfriend, Scooter Jackson.

“No, he’s not,” Reign declared after seeing a comment that claimed the “Baby” singer is his parent. “Bro, I swear, Justin Bieber is not my dad. Scotty … Scotty … Scotty is my dad.”

Reign added, “I don’t know how old my mom was, but I think Justin Bieber was 16 when I got born. I don’t think my mom would do that.”

Kardashian, 45, shares Reign and his older siblings Mason, 15, and Penelope, 12, with ex-boyfriend Disick, 41. The former couple dated on and off for nine years before calling it quits for good in July 2015.

Following her split from the Talentless founder, Kardashian was linked to Bieber, who was about 21 years old at the time.

“Justin started hanging out with Kourtney alone because she started going out more,” a source exclusively told Us Weekly in December 2015. “He’s been showing her a good time.”

A second insider told Us that Bieber had “bragged to friends recently that he has been hooking up with Kourtney Kardashian,” and they “text each other all the time.”

In January 2016, Bieber played coy about the fling, revealing on The Bert Show that Kardashian was “great” but there wasn’t anything romantic going on between the two.

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Bieber became friends with the famous family in 2010, when he appeared in an Elle photo shoot with Kourtney’s sister Kim Kardashian. He proceeded to spark a friendship with the youngest Kardashian-Jenner sisters, Kendall and Kylie Jenner.

Justin’s now-wife, Hailey Bieber, has been one of Kendall’s best friends for years, so he has remained a fixture within their family.

The Canadian musician was first linked to Hailey, 28, on New Year’s Eve in 2015. They tied the knot in September 2018 and welcomed their first baby, son Jack, in August 2024.

Kourtney, meanwhile, found love with Travis Barker in 2021. The couple got married in May 2022 and celebrated with multiple ceremonies.

The Poosh founder welcomed her first baby with Barker, 49, son Rocky, in November 2023.