Hailey Bieber puts on a cheeky display in a thong bikini after revealing the secret to her incredible figure

Hailey Bieber put on a cheeky display in a tiny string bikini in her latest social media post.

On Thursday, the model took to Instagram to share a photo of herself lounging around her mansion in just her swimsuit and she declared: 'it's summer.'

The 29-year-old Rhode founder looked incredible in the snap as she showcased her pert bottom in a bright yellow string bikini.

In addition to the sexy snapshot, Hailey also shared a photo of a room inside the mansion she shares with her husband Justin Bieber. 

The living room snap showed off her massive, geometric couch and a flat screen television.

While Hailey wowed with her sultry bikini snap, she recently revealed that she works hard to maintain her model figure. 

Last week, Hailey - who is the daughter of Stephen Baldwin - gave fans a rare glimpse into her grueling workout regimen.

On Saturday, she took to her Instagram Story to share a short clip of herself working out with celebrity fitness trainer Kirsty Godso.

Hailey performed dumbbell hip thrusts, which targets the abdominals and glutes, while holding herself up off of the ground between two benches.

Over the video, she wrote that she was in the midst of a 'Saturday a** kick' with Godso, who boasts over 380,000 followers on Instagram.

The Rhode founder also set the video to the tune of Don Toliver's song Call Back. 

For her workout, Hailey wore a light gray sports bra paired with figure-hugging yoga pants and white sneakers with black laces.

Hailey's Instagram post came after she revealed her pregnancy with her son Jack Blues Bieber, who is now 19 months, was a 'surprise'.

While making an appearance on the SHE MD podcast, she discussed her pregnancy and postpartum experience.

Hailey was chatting with podcast hosts Mary Alice Haney and Dr. Thaïs Aliabadi, who happens to be Hailey's obstetrician-gynecologist (OBGYN).

On their podcast, Hailey recalled a story about how she was diagnosed with a medical condition that can cause pregnancy complications right before learning that she was pregnant. 

Hailey was asked if she and Justin were 'trying' or if their baby was a 'surprise.' 

Referring to her personal physician, Hailey shared: 'It was a surprise. She told me this was going to happen because she was like...'

Dr. Aliabadi chimed in: 'And I told her, like, "Don't get pregnant!"'

She said that her OBGYN had diagnosed her with uterine septum, a genetic condition, as she explained: 'I had a septum in my uterus, and Dr. A kept saying, "Well, we need to look at this and keep an eye on it before you get pregnant because it could potentially be an issue..."'

Hailey continued: 'And I was like, "OK. Well I'm not thinking about getting pregnant right now, so we'll just cross that bridge when we get there." And then I magically got pregnant.'  

Dr. Aliabadi confirmed: 'Your [uterine septum] was moderate. It affects one to three percent of women, and with moderate, you have a higher risk of miscarriage with the pregnancy.'