Caitlyn Marie Jenner was seen this morning arriving at Heathrow Airport in London, UK. Speculation as to why she is here still remains. Pictured: Caitlyn Marie Jenner Ref: SPL5016466 160818 NON-EXCLUSIVE Picture by: Jules / SplashNews.com Splash News and Pictures Los Angeles: 310-821-2666 New York: 212-619-2666 London: 0207 644 7656 Milan: +39 02 4399 8577 Sydney: +61 02 9240 7700 photodesk@splashnews.com World Rights,
Whats she doing here? (Picture: Jules / SplashNews.com)

The Celebrity Big Brother line-up could be a lot more interesting than we thought, if this arrival in Heathrow is anything to go by.

Caitlyn Jenner has been pictured landing in London – sparking rumours that she could be entering the CBB house tonight.

The 68-year-old landed at Londons Heathrow Airport with rumoured girlfriend Sophia Hutchins, just hours before the new series of CBB begins.

The reality star kept it casual in a pair of skinny jeans and a brown top paired with white trainers, and was seen pulling a small carry-on case behind her.

Caitlyn Marie Jenner was seen this morning arriving at Heathrow Airport in London, UK. Speculation as to why she is here still remains. Pictured: Caitlyn Marie Jenner Ref: SPL5016466 160818 NON-EXCLUSIVE Picture by: Jules / SplashNews.com Splash News and Pictures Los Angeles: 310-821-2666 New York: 212-619-2666 London: 0207 644 7656 Milan: +39 02 4399 8577 Sydney: +61 02 9240 7700 photodesk@splashnews.com World Rights,
Caitlyn was accompanied by Sophia Hutchins (Picture: Jules / SplashNews.com)
BGUK_1312644 - London, UNITED KINGDOM - Reality star Caitlyn Jenner arrives in the UK at Heathrow Airport on a flight from Los Angeles. Pictured: Caitlyn Jenner BACKGRID UK 16 AUGUST 2018 UK: +44 208 344 2007 / uksales@backgrid.com USA: +1 310 798 9111 / usasales@backgrid.com *UK Clients - Pictures Containing Children Please Pixelate Face Prior To Publication*
Could Caitlyn be heading to Borehamwood? (Picture: Backgrid)

It is unclear what Caitlyn is in the UK for – but the timing has people speculating she is making a surprise entrance into the Borehamwood bungalow.

The theme for the new series is Eye Of The Storm – with Channel 5 signing up celebs who have been the subject of a media storm.

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This would definitely apply to former Olympian Caitlyn.

The former Keeping Up With The Kardashians star made global headlines when she announced in 2015 in an interview with Diane Sawyer that she identified as a woman.

The new series of CBB begins tonight (Picture: Rex)

That June, Caitlyn – who shares daughters Kylie and Kendall with ex-wife Kris Jenner – debuted her true self on the cover of Vanity Fair wearing a white satin bustier under the tagline: I am Caitlyn.

Jenner underwent gender reassignment surgery in January 2017 after legally changing her name in September 2015.

It was reported last year that Caitlyn had been offered £1 million to take part in the 2017 series of CBB – has she now changed her mind?

More: Celebrity Big Brother

The line-up for Celebrity Big Brother is expected to include Kirstie Alley, Stormy Daniels, Jermaine Pennant, Roxanne Pallett and Ben Jardine.

Ryan Thomas, Dan Osbourne and Chloe Ayling have all been pictured poorly hiding as they headed to their hotels last night.

Celebrity Big Brother kicks off tonight on Channel 5 at 9pm.

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