The reality star quit the show last year but has made a couple of appearances this series to support cousin Chloe Sims through her troubles with brother Charlie and split from Elliott Wright.
Frankie was among the stars who attended James 'Arg' Argent's crazy looking Mad Hatter-themed party on Wednesday, 1 April.
We'll see all the goss on Sunday night's ep!
Frankie was pictured sitting on a picnic area resembling a chess set, alongside TOWIE star Vas J. Morgan.
Sadly as she was sitting we couldn't see her outfit!
All the TOWIE cast really seem to have got into the costume spirit for the day, with Chloe Lewis, Jake Hall, Lydia Bright and Arg among those looking rather fantastic in their elaborate get-ups.
TOWIE concludes its current series Sunday night at 10pm on ITVBe.
Copyright: Twitter @Mario_Falcone
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