Kourtney Kardashian ’s youngest son, Reign Disick, has long faced speculation that pop star Justin Bieber is his biological father.

The 10-year-old has reacted to the internet chatter during an Instagram Live session with his stepsister Alabama Barker's boyfriend, Scooter Jackson. Responding to a comment suggesting Bieber was his father, Reign firmly shut down the rumours saying, "No, he's not. Bro, I swear, Justin Bieber is not my dad. Scotty… Scotty… Scotty is my dad.”

He went on to point out the timeline inconsistency, adding, “I don’t know how old my mum was, but I think Justin Bieber was 16 when I was born. I don’t think my mum would do that.”

The rumours linking Bieber to Kourtney began doing the rounds when the two teased fans by posing together for a rather steamy shoot. The two were frequently spotted together during the Los Angeles leg of Bieber’s Purpose tour in 2015, sparking dating speculation. However, at the time, Bieber briefly dated Kourtney's supermodel sister Kendall Jenner .

Reign is the son of Kourtney Kardashian and Scott Disick , who were in a decade-long relationship before parting ways in 2015. The former couple share three children—Mason, Penelope, and Reign. Kourtney gave birth to Reign in December 2014, at which time Bieber was 20 years old.

Meanwhile, Kourtney has often spoken about how similar Reign looks to his dad Scott. In an episode of The Kardashians, she commented on his comedic personality, saying, “I didn’t know where [he] gets [his] sense of humour. He’s like a Jim Carrey. I’m starting to get a lot of vibes, like his dad. I think he’s starting to get that sense of humour. I’m like, just what we need.”

Kourtney is now married to musician Travis Barker, whom she wed in May 2022. The couple welcomed their first child together, a son named Rocky, in November 2023.