Will there be romance between Doctor Who companions Ryan and Yasmin?

"I can’t remember!" Cole teased when asked about the relationship by Metro.

"We’re getting good at 'can’t remember' answers," Gill added, "which means we’re not allowed to say because people are standing behind us!"

Sure, they may be trying to stir the pot – but it wouldn't be beyond the realms of possibility for sparks to fly between the two characters? After all, recent series of Doctor Who have shown us relationships between Rose Tyler and boyfriend Mickey Smith (played by Billie Piper and Noel Clarke) and married couple Amy Pond and Rory Williams (Karen Gillan and Arthur Darvill).

Sadly it looks like the two new additions are good at keeping secrets. In a previous interview with RadioTimes.com, Gill revealed that in the past she's found it easy to keep shtum about Doctor Who secrets — starting with her own casting.

"It’s not hard not telling people. I really like to sign something and start it and then say you’ve got a job," she said.

Both she and Cole have worked together previously on Hollyoaks — meaning that their chemistry was already there when they started filming.

"Jodie [Whittaker] and Brad[ley Walsh] are absolutely amazing and really welcoming, but [with Tosin] it felt like I had my friend," Gill said.

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• When is Doctor Who back on TV?

Doctor Who returns on the 7th October on BBC1