The actress, who played a young Donna Sheridan in the 2018 sequel, posted a photo of herself on the island of Vis in Croatia on Sunday (May 19), where she filmed scenes for Mamma Mia 2: Here We Go Again!
Her Instagram story was also full of classic Abba tunes, fuelling speculation that the actress is preparing to film a third Mamma Mia movie.
You can check out the teasing photo post below:
Lily's post follows a recent interview with fellow Mamma Mia star Stellan Skarsgård, who said he would definitely be up for another film, on the provision his character was still alive and kicking.
The Chernobyl actor previously told Digital Spy: "I wouldn't have to read the script. If they call, I'll come.
"It was ten years between the two [Mamma Mia films], so I will probably appear in an urn in the next one."
As well as dropping teasing Instagram hints, Lily is currently preparing to play Mrs de Winter in the forthcoming Netflix adaptation of Daphne Du Maurier's classic thriller Rebecca, alongside Armie Hammer and Kristin Scott Thomas.
Alas, we hope she can find time in her busy schedule for one more Abba outing.
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