Nadiya Bychkova and Kai Widdrington kept a low profile when they were spotted out together on Sunday.
The Strictly Come Dancing professionals, who are currently taking part in the show's arena tour, both wore facemasks and baseball caps as they rode an escalator alongside fellow Strictly star Aljaž Škorjanec.
It follows reports that Nadiya, 32, and Kai, 26, are 'growing close' in the wake of her split from her fiancé Matija Škarabot.
Spotted: Nadiya Bychkova, 32, and Kai Widdrington, 26, kept a low profile when they were spotted out together on Sunday
Out and about: The Strictly Come Dancing professionals, who are currently taking part in the show's arena tour, both wore facemasks and baseball caps
Nadiya wore her blonde hair loose and wore a chic all-black look and was not wearing her engagement ring.
Kai teamed his beige cap with a zip-up white jacket and black bottoms.
Both bowed their heads as they stepped off the moving stairway and Nadiya clutched her phone in her left hand.
MailOnline has reached out to representatives for both Strictly stars for comment.
Pals: The pair rode an escalator alongside fellow Strictly Come Dancing pro dancer Aljaž Škorjanec
Growing close: It follows reports that Nadiya and Kai are 'growing close' in the wake of her split from her fiancé Matija Škarabot
Earlier this week, The Sun claimed Nadiya - who has been seen without her engagement ring on in recent days - and Kai's behaviour has been 'raising eyebrows' behind-the-scenes.
A source told the publication: 'AJ and Kai got really close during the show and their chemistry was electric. Nadiya is incredibly flirty and it has certainly raised eyebrows.'
The newspaper also claims that the pair enjoyed a dinner together in Birmingham during the tour earlier this week.
No ring: Nadiya was not wearing her engagement ring when she stepped out on Sunday
Oh dear: According to reports, Nadiya and Kai's behaviour has been 'raising eyebrows' behind-the-scenes
Chic: Nadiya wore her blonde hair loose and wore a chic all-black look and was not wearing her engagement ring
An onlooker claims they headed to a bar chatted
