The couple are thought to have wed in a private civil ceremony in New York last autumn after they were photographed entering a marriage license courthouse.
Bieber later confirmed the news on social media by sharing a photograph of the duo walking hand-in-hand with the simple caption: “My wife is awesome.”
Following the public name change, fans were quick to question why the model did so considering she already had such an instantly recognisable name as part of the Baldwin acting family.
95-year-old couple celebrate their 75th Valentine's Day
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Now, the 22-year-old has revealed a lot of thought went into her decision and that she even discussed it with her father, actor Stephen Baldwin.
“I'm very proud of my family name. I come from a great family with a history in this industry,” Baldwin told Bustle.
Appearing on The Tonight Show Starring Jimmy Fallon she said: “I always wanted to add his name to mine because I feel, like, you know, we’re becoming family, and I’m a little traditional and old school like that.
“But I don’t take away my identity. He gets added to who I am."
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