He shared another throwback with Hailey, captioning the shot, \"My wife and I :) where it all began.\"

View this post on Instagram

My wife and I :) where it all began

A post shared by Justin Bieber (@justinbieber) on Sep 27, 2019 at 5:07pm PDT

The two were legally married last year at a New York City courthouse in September 2018.

The celebration on Monday will include many of the couple's family and friends.

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