Justin Bieber and Hailey Baldwin. Picture: Instagram

Hailey Baldwin says her engagement to Justin Bieber is the "most adventurous thing" she's ever done.

The 21-year-old model got engaged to the 'Sorry' hitmaker in July, and she has now said that whilst she's had a pretty busy couple of months in general with several trips abroad, she would say her engagement has been the highlight of her year by far.

When asked by Coveteur what the most adventurous thing she's done lately has been, the blonde beauty said: "My entire summer has been quite adventurous in life in general. I've been travelling all over. For me, being adventurous is flying by the seat of my pants, which isn't something I'm normally comfortable with, but I've been doing it for the last few months. Just travelling, and it's so fun to be able to pick up and do things. 

"Well, I got engaged! I think that's probably the biggest OMG moment of the year for me, of my life. So that's probably top."

Meanwhile, it was recently claimed that Hailey and Justin, 24, have already tied the knot after they were spotted at the Marriage Bureau at the courthouse in New York City last week.

Hailey has denied reports, writing on social media: "I understand where the speculation is coming from, but I'm not married yet!"

But her uncle Alec Baldwin seems convinced they did indeed get married last week, as whilst he said he doesn't know "what the deal is" with the couple, he confirmed they are already husband and wife.

He said: "They just went off and got married and I don't know what the deal is. We text Hailey every now and then. We met him one time." 

It comes after the pair were spotted at the NYC courthouse, where it was thought they were picking up their marriage license, but it was later claimed they had tied the knot there and were planning another celebration in Justin's native Canada.

A source said at the time: "They went ahead and did it without listening to anyone. They're going to have a big blowout, in front of God and everyone they love."