Newlyweds Justin Bieber and Hailey Baldwin have said they waited until they were married before having sex.

The couple, who tied the knot last year after a 12-week romance following a 10-year friendship, opened up about the struggles in their marriage and their deep love for one another during an interview with Vogue magazine.

The 24-year-old singer and 22-year-old model rekindled their relationship last June having dated briefly three years earlier, when things did not end well.

"Negative things happened that we still need to talk about and work through," Hailey said. "'Fizzled' would not be the right word - it was more like a very dramatic excommunication. There was a period where if I walked into a room, he would walk out."

Justin Bieber and Hailey Baldwin open up about their relationship in Vogue magazine

Justin revealed that he had a "legitimate problem with sex" before he and Hailey reunited and said he had chosen to give up sex for more than a year to get closer to God.

He said: "He doesn't ask us not to have sex for him because he wants rules and stuff. He's like, 'I'm trying to protect you from hurt and pain'.

"I think sex can cause a lot of pain. Sometimes people have sex because they don't feel good enough. Because they lack self-worth.

"I wanted to rededicate myself to God in that way because I really felt it was better for the condition of my soul.

"And I believe that God blessed me with Hailey as a result. There are perks. You get rewarded for good behaviour."

The couple rekindled their relationship last year and tied the knot after 12 weeks

In the candid interview, the couple also admitted their marriage is not all a "magical fantasy".

Hailey, the daughter of actor Stephen Baldwin, said they're trying to "build a healthy relationship" but admitted that it's "going to be hard".

"We're coming from a really genuine place. But we're two young people who are learning as we go. I'm not going to sit here and lie and say it's all a magical fantasy," she said.

"It's always going to be hard," she continued. "It's a choice. You don't feel it every single day. You don't wake up every day saying, 'I'm absolutely so in love and you are perfect'. That's not what being married is. But there's something beautiful about it anyway - about wanting to fight for something, commit to building with someone."