Seann and Katya, who are paired up on the BBC ballroom show, were filmed in an embrace in the street after a night out at a central London pub on Wednesday.
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Seann Walsh and Katya Jones
BBC
Katya is married to fellow ‘Strictly’ professional Neil Jones, while Seann is in a long-term relationship with actress Rebecca Humphries.
Rebecca has appeared in the ‘Strictly’ audience and been a vocal supporter of both Seann and Katya on Twitter since they were paired together last month.
However, all parties have remained silent on social media since the video and pictures were published on Saturday night.
HuffPost UK has contacted representatives for Katya, Seann and ‘Strictly Come Dancing’ and is awaiting responses.
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The pair are coupled up professionally on 'Strictly'
BBC
Viewers saw Seann and Katya dance a seductive Paso Doble during Saturday night’s episode, just hours before the pictures surfaced.
They were watched on by Katya’s husband Neil, who joined the show along with Katya in 2016.
Neil has yet to receive a celebrity partner, but serves as a dancer in group routines as well as coupling up with the stars of the Christmas and Children In Need specials.
Katya, meanwhile, has seen her profile on the show soar after winning last year’s series with Joe McFadden, having famously partnered with Ed Balls during her first series.
On Thursday, just hours after she was pictured kissing Seann, Katya posted a picture of her and Neil on Instagram in a throwback to their recent Cuba holiday together.
“One of the best holidays!!!!” she wrote.
The pair, who married in 2013 after five years of dating, had gone away together to celebrate their fifth wedding anniversary, with the pictures published in OK! magazine.
In the accompanying interview, Katya also said children were “in the near future” for them both.
13 times the Strictly "curse" struck
Rachel Riley(01 of13)
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The Countdown presenter announced her split from her husband just weeks after her stint on the show. In 2014, she and pro dancer Pasha Kovalev confirmed they were dating, though she remained insistent that Strictly had nothing to do with her marriage split.
Susanna's marriage ended in February 2014, weeks after she finished as a runner-up in the competition. The Good Morning Britain anchor continued to live with her ex, Dominic Cotton, and their two sons in the months that followed. (credit:Ian West/PA Archive)
Louise Redknapp(03 of13)
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After reaching the final of the 2016 series, Louise began to be plagued with rumours her 19-year marriage to former footballer Jamie Redknapp was on the rocks. Months later, the couple confirmed they had gone their separate ways. (credit:Doug Peters/EMPICS Entertainment)
Joe Calzaghe(04 of13)
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Boxer Joe and pro dancer Kristina Rihanoff initally denied romance rumours when they were paired together in 2009. However Joe split from his girlfriend just weeks later. Joe and Kristina later confirmed that they were a couple, before splitting after four years together. (credit:Mark Cuthbert via Getty Images)
Ben Cohen(05 of13)
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While on the show, Ben denied rumours that he was romancing his pro partner Kristina, and later split from his wife Abby. He and Kristina went on to confirm their relationship but remained insistent it had only begun after the breakdown of his marriage. The couple now have a child together. (credit:Steve Thorne via Getty Images)
Matt Di Angelo(06 of13)
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The EastEnders star reportedly first hooked up with Flavia Cacace during their time dancing together on the 2008 series – on which Flavia's then-boyfriend Vincent Simone was also a dancer. However, they weren't together for long... (credit:Jon Furniss via Getty Images)
Jimi Mistry(07 of13)
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Just a year after getting together with Matt, Flavia ended the relationship after finding love with her new dance partner Jimi. The couple married in 2013. (credit:Dave Hogan via Getty Images)
Natasha Kaplinsky (08 of13)
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Newsreader Natasha and Brendan were plagued by romance rumours when they were paired up for the first ever series of Strictly in 2004. Despite being insistent that they were just friends, Natasha and Brendan both split from their partners shortly after winning the series. (credit:MJ Kim via Getty Images)
Daisy Lowe(09 of13)
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Daisy split from her boyfriend Bradley "Frankie" Wade during her stint on Strictly in 2016. The relationship was still quite new and the pair struggled to find the time to see each other with her commitments to the show. (credit:PA Archive/PA Images)
Sunetra Sarker(10 of13)
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Sunetra split from her husband of 10 years just before filming for the 2014 series began. (credit:Eamonn M. McCormack via Getty Images)
Dani Harmer (11 of13)
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Tracey Beaker star Dani split from her boyfriend just days after filming began in 2012. (credit:John Phillips via Getty Images)
Helen George(12 of13)
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Just after Helen announced she was one of the 2015 contestants, the Call The Midwife actor revealed she was splitting from her husband of four years, Oliver Boot. (credit:Doug Peters/EMPICS Entertainment)
Georgia May Foote(13 of13)
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Georgia entered Strictly while in a relationship with former Coronation Street co-star Sean Ward. However, just after the series ended, the couple announced their split, and it wasn't long before she embarked on a relationship with dance partner Giovanni Pernice. They eventually broke up after less than a year together. (credit:Ian West/PA Archive)