Related: Justin Bieber, Hailey Baldwin confirm engagement
TMZ didn't confirm the two are married, only that they were in the courthouse, where marriage licenses are issued. The site later reported they could get married as early as next week in a small ceremony.
"Entertainment Tonight" reported that the couple entered the building in a back office to be discreet, but it appears photos still caught them.
Baldwin recently told The Cut her wedding will be small and preferably on the West Coast.
Marriage licenses in New York are valid 24 hours after being issued until 60 calendar days from that date, meaning Baldwin and Bieber could get married between Friday and Nov. 13.
Baldwin took to Twitter to make it clear her marital status hasn’t changed.
“I understand where the speculation is coming from, but I’m not married yet!” she wrote Friday.
The tweet has since been deleted.