While neither party has confirmed or denied the rumours, Hailey's dad Stephen Baldwin seemingly congratulated the pair on social media in a now-deleted post.
Before he proposed to Baldwin, Bieber dated Gomez on and off for years. "Excited for the next chapter!" the singer's father Jeremy Bieber wrote on Instagram with a picture of his son. Bieber famously dated Selena Gomez from 2010 to 2012 and sparked rumors of a reunion with her past year.
The couple, which previously dated in early 2016, rekindled its romance last month and has been inseparable ever since, travelling to Florida and NY together, before jetting off to the Bahamas.
In video taken by Instagram user @zoe_nicolee, Bieber is spotted dancing happily to his own song with Luis Fonsi, "Despacito", on the reported night of the engagement.
Bieber and Baldwin have recently spent time together in Canada, New York City and the Hamptons on Long Island, New York, where they were photographed kissing and holding hands.
In May, before the two started dating again, Baldwin acknowledged their past.
Bieber foreshadowed the possibility of marrying Baldwin in a 2016 interview with GQ.
Other onlookers there at the time have confirmed this account of what happened. We went through a long period of time when we weren't friends. "We spend a lot of time together". 'We've moved past that.