Dan Osborne uploaded a snap of Casey in bed with Dani Armstrong and Georgie Koulousou, writing: "Having a hard time in Ibiza!"
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Jasmin Walia also shared a picture of Casey out for dinner with some of the cast, looking like she was fitting in very well.
Considering Dan and the rest of the TOWIE gang were there to film a special episode for the new series, it looked like Casey was definitely joining our favourite Essex reality show.
Casey, 29, took to Twitter this week to address rumours she was joining the cast.
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She wrote: "Been a lot of hype about me appearing on TOWIE. As much as I love the show I was out here for business and pleasure. xx"
Well that doesn't sound like she's denying it to us…
It was reported earlier this year that Casey was 'in talks' with producers about joining the show.
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In June, a source told the Mirror: "Casey is mates with a lot of the cast anyway and hangs out with them socially, so it seemed like a natural progression.
"But she's keeping her options open for now."