Kendall Jenner
Model Kendall Jenner has denied dating Justin Bieber in the past, stating they are just 'friends' REUTERS/Kevork Djansezian

Baby singer Justin Bieber and fashion model Kendall Jenner have fuelled rumours they are dating once again after sharing an intimate photo on Instagram.

In the image which Bieber, 21, posted on his own account, Keeping Up With The Kardashians star Jenner can be seen sitting on a patch of grass wearing a bikini while the pop star leans over her shoulder and touches her waist.

The Balmain model also posted a photo from the same day, which is believed to have taken place in Los Angeles, and like Bieber, she left the image captionless.

It is believed that the pair are heading to Coachella Music Festival, which kicks off on 10 April, after model Hailey Baldwin shared a photo on Instagram with the caption: "Good start to Coachella."

Rumours of a romance between Bieber and Jenner have circulated for months and it was recently claimed that they are "friends with benefits".

A source told HollywoodLife: "When Kendall and Justin are together, they flirt so hardcore. They love telling people they're just friends, but they're playing with everyone - there is more to it.

"They've hooked up in the past and there's still something there. They just like to keep it totally secret, but a lot of people know there is something there. They aren't fooling everyone."

However, in November 2014, Jenner, 18, denied the dating rumours and insisted she and the All That Matters hitmaker are just good friends. "He's a longtime friend of our family. Everyone always likes to assume things, but no," Jenner told ABC's Nightline.

When asked if she is dating anyone, the reality star replied: "I'm not. I'm truly focusing on my career. If it comes, it comes."

good start to coachella

A photo posted by Hailey Baldwin (@haileybaldwin) on

There has been speculation that Bieber's ex-girlfriend Selena Gomez may find the romance rumours difficult to deal with as she is thought to be close friends with the model.

Since splitting from Gomez in 2014, Bieber has been linked to several ladies, including models Yovanna Ventura and Hailey Baldwin. Recently, he was also linked to Problem singer Ariana Grande after they got cosy on stage during a show on her Honeymoon Tour.

There were social media rumours that the singer's boyfriend Big Sean gave the Canadian star a warning via Twitter for appearing to flirt with Grande, 21, but these claims were denied by the rapper's publicist who told TMZ the tweets were fake.