Justin is worth almost $265 million while Hailey hovers around $3 million.
Bieber, 24, and Baldwin, 21, were spotted at the city's courthouse marriage bureau, but it was unclear if they tied the knot.
But the big, official wedding hasn't happened yet, just the two going down to a courthouse in NY together yesterday to make things legal.
According to People, Justin Bieber and Hailey Baldwin got married on Friday (September 14) in a quiet courthouse ceremony. The mag's source said that the rebellious blondes "went ahead and did it without listening to anyone".More news: Samsung Teases a Four-Lens Camera With '4x Fun' Event
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But, Baldwin put the rumours to rest, tweeting: "I understand where the speculation is coming from, but I'm not married yet".
People reports that is where they said "I do", but they will have a more traditional wedding at a later date. They were together for several months, attending weddings and parties together before breaking up again in March 2018. It has four-bedrooms featuring a private equestrian facility with stables and a 5/8 mile race track.
A source told ET at the time that while Bieber and Baldwin did register for a marriage license, they were only getting a license and did not have a marriage ceremony.
Party place: They will likely throw their wedding bash at the $5m mansion in Ontario, Canada he purchased this summer.
If they did pick up a marriage license application, the document, once filled out and submitted to the court, would be valid for up to 60 days.