However People magazine dialled back the celebrations by alleging Baldwin was quick to squash the idea before it got much traction.
However, shortly after reports surfaced the pair had married at the Manhattan courthouse, Baldwin tweeted "I understand where the speculation is coming from, but I'm not married yet!".
In a recent interview with Australia's Stellar magazine, Hailey admitted she was "beyond excited" about her wedding, but didn't share any details, and now insiders claim she could be Mrs. Bieber within a week.
The pair have only been engaged for two months, but it appears they've ditched the wedding planning and gone straight to the legalities.
On September 10, Justin was seen with her father Stephen Baldwin; they were likely talking over the ceremony. "You are the love of my life Hailey Baldwin and I wouldn't want to spend it with anybody else".
TMZ claims they will throw their wedding bash at the $5m mansion in Ontario, Canada he purchased this summer.
Another added: "I'm so confused, are Hailey and Justin married or not?"
"I can't wait to marry you, baby", Justin could be heard saying, through tears, to his now-wife at the courthouse.
Eyebrows raised at the Hillsong Church duo (who first met in 2009) considering Justin only split from his on/off girlfriend since 2010, pop diva Selena Gomez, six months ago.
Multiple outlets reported on Friday that Baldwin and Bieber said "I do" one day earlier in NYC after they were seen at the Marriage Bureau.
The couple were also spotted just hours ago in NY, holding hands as they left a hotel.