Katie posed for a selfie with Abi this afternoon (18 December) before posting it on Twitter with the caption: "TOWIE fans, look who I bumped into today!"
Unfortunately though, Katie has given us no explanation for their meeting. Was it by chance, or have the girls been working on a secret project together?
Abi has definitely been up to something today, as she mysteriously told fans on her Twitter account: "Filming done for a new little project! Can't wait for you all to see..."
Girls, you're such teases!
Abi appeared in The Only Way Is Essex both last year and in the early part of 2014, however she has since been persuing other avenues, along with working as a teeth whitening technician.
Inspirational star Katie, meanwhile, is currently filming for her new series of Channel 4's Bodyshockers, which is due to return to our screens next year.
Earlier this month, Katie got engaged to her long-term partner James following a romantic date night at home.
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