Model Hailey Bieber (formerly Baldwin) has opened up about how important her Christian beliefs are in her relationship with Justin Bieber.

She was speaking with actress and comedian Yvonne Orji on Bieber's YouTube series "A Conversation With" and started describing what the biggest thing was in her relationship with 27-year-old Justin Bieber.

"They ask me all the time, 'What would you say is the biggest thing in your relationship? You guys are really happy,"' Bieber said. 

"And I'm like, 'It's our faith.' It's what we believe in. If we didn't have that, we wouldn't even be here. We wouldn't even be together," she added.

She went on to say she sometimes feels other Christians judge her for modelling swimwear or lingerie.

"I felt weird about posting certain photos of myself or feeling like, 'People in the church are gonna see this. Am I doing something wrong? Am I setting a bad example?' And the reality is - no,'" Bieber added.

"I obviously believe in modesty but a big part of my job is body and face and vanity and that is the whole premise of what I do, so it's actually really difficult to try to be like, 'This is what I do for my job but on Sunday I'm in church and that's a real thing for me and that's a real lifestyle for me and Jesus is a real thing for me,' without it looking like I'm compromising everything," 

The duo married in 2018.