Bieber's mother is of French-Canadian descent; his paternal great-grandfather was of German ancestry, and his other roots are English, Scottish and Irish.
Justin Drew Bieber was born on March 1, 1994, in London, Ontario, Canada, to Pattie Mallette and Jeremy Bieber. His dad, Jeremy Bieber, left to start a family with another woman, so after becoming pregnant when she was 18 years old, his mother Pattie raised Justin with a help of Bieber's grandmother Diane and stepfather, Bruce.
According to some media reports, Justin and his father weren’t close growing up; his dad has been at times described as being a “deadbeat” who only resurfaced after Justin achieved YouTube fame. However, despite their allegedly complicated relationship, Justin has maintained that he and his dad are close. In February 2016, Justin told GQ magazine, “I’m a lot closer to my dad than I am to my mum.”
Through Jeremy, Bieber has three younger half-siblings. Jeremy and his ex-girlfriend Erin Wagner have two children, a daughter Jazmyn and a son Jaxon. They broke up after seven years in 2014. Jeremy later married his girlfriend Chelsey in February 2018, and they have a daughter together named Bay. Justin welcomed little sister Bay to the family.
As a child, Bieber showed a strong interest in music, teaching himself to play many instruments. When he was 12, he entered a local talent competition, and placed second. His mother posted his performance on YouTube and continued to post other clips of Bieber singing.