The real reason behind Strictly professionals Carlos Gu and Nancy Xu's fall out has been reported after they were spotted keeping their distance over the weekend.
Nancy, 33, and Carlos, 31, both grew up in China and have been close since childhood but it was recently revealed they are currently refusing to speak.
It has been claimed that tensions sparked between the formerly close pals when Carlos was left disappointed not to be paired with a celebrity this series.
Meanwhile, Nancy has apparently been busy rehearsing with her partner Shayne Ward, 40, and the atmosphere between them has 'shocked' everyone.
An insider told The Sun: 'The feud between Nancy and Carlos is really sad and has left everyone really shocked. They've been close since childhood, but have fallen out and unfollowed each other on socials.'
The source added: 'The atmosphere on set is said to be awkward and tense when both are around, and to many it was a relief when Carlos didn't attend the show weeks ago'.
However, a source told MailOnline that the dancers are doing their best to keep it professional while at work, saying: 'Carlos and Nancy are extremely cordial and always incredibly professional on Strictly premises.'
It comes after fans noticed them awkwardly keeping their distance in the 'Clauditorium' during Saturday night's show.
Nancy Xu and her Strictly dance partner Shayne Ward performing on Saturday night's show
Carlos (pictured), 31, has not been given a celebrity partner this series
Just hours after the live episode aired on the BBC it was claimed that the pair have had a 'shocking' falling out and are now refusing to speak behind the scenes.
The pair have unfollowed each other on social media and, according to new reports, tensions backstage have left their fellow pros 'shocked'.
As the dancers and pros debriefed with co-host Claudia Winkleman in the upstairs area of the studio Nancy made sure to stand on the far left with her celebrity partner Shayne Ward.
Carlos - who doesn't have a partner this year - was stood far away on the other side of Claudia as he supported fellow professional dancer Amy Dowden after she returned to the show following a health scare.
Carlos was dressed as David Bowie with his iconic face paint and red hair. MailOnline has contacted dancers representative and the BBC for comment.
During previous seasons, Carlos has been paired with TV presenter Angela Scanlon and EastEnders stay Molly Rainford.
Carlos and Nancy are not the only two pros who are avoiding each other this series.
After Nadiya Bychkova and Kai Widdrington's recent split, tensions are said to be frosty between the pair.
Carlos - who doesn't have a partner this year - was stood far away on the other side of Claudia as he supported Amy Dowden after she returned to the show following a health scare
Just hours after the live episode aired on the BBC it was claimed that the pair have had a 'shocking' falling out and are now refusing to speak behind the scenes
Nancy and Carlos (pictured together on the show) both grew up in China and have been close since childhood
The former friends no longer follow each other on social media
During previous seasons Carlos has been paired with TV presenter Angela Scanlon (pictured) and EastEnders stay Molly Rainford
They are reportedly refusing to stand next to each other on screen.
Nadiya has previously revealed she 'isn't friends' with her former flame and the pair have been seen to be noticeably standing apart while in the Clauditorium during the live shows.
The BBC refused to comment and MailOnline have contacted representatives for Nadiya and Kai.
The couple reportedly ended their two-year romance after 'emotionally drifting away from each other,' with sources claiming the pressures of touring together took a toll on their relationship.
Speaking to The Mirror earlier this month Nadiya revealed that she and Kai are still working on Strictly, despite not having celebrity partners, and they'll always keep things professional when they dance together.
