Justin Bieber and Hailey Baldwin Bieber look back on an extremely special day.

Justin Bieber and Wife

The couple was secretly married in September 2018 they celebrated their fourth year as a married couple on Tuesday.

To commemorate the occasion for the occasion, the Canadian singer posted a photograph of him and his wife lying on top of each other, with a sweet puppy between them.

"Happy anniversary to my best friend and wifey @haileybieber .. thanks for making me better in every way," Bieber, 28, captioned her Instagram post.

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In keeping with the same sentiment, Baldwin Bieber, 25, has also posted an adorable Instagram post that featured an image carousel featuring the couple.

"4 years married to you," she wrote in the caption. "The most beautiful human I've ever known... the love of my life. Thank God for you. ."

One photo shows the couple kissing during the South Carolina wedding ceremony, which was held just one years after

Justin Bieber and Hailey

the couple got married in the New York City courthouse, including Baldwin Bieber's veil, which said "Till Death Do Us Part."

Justin Bieber and Hailey

"Hailey has been extremely kind to Justin the same way Justin was supportive of the health problems she was facing," A source who is close to the couple