However, the brand new rabbit image on the X-Men: Apocalypse star's bicep bore little resemblance to her 28-year-old musician beau.
"BOOOM #curtmontgomerytattoo does it again", Joe captioned the pic, along with a few emojis.
The tattoo is a loose outline of a seemingly naked woman and fans seem to think there are similarities between the new ink and Sophie.
"Is that Sophie?", one fan asked, while others filled up his comments writing, "Omg", and simply "Sophie".
And then, according to US Weekly, another fan tweeted, "There's a scene where Sansa is exactly like [the woman] in Joe's tattoo so yes, it's Sophie/Sansa Stark".
So far, Turner is keeping tight-lipped on details about Jonas' tat as well.
As for when they'll tie the knot, Turner and Jonas won't be setting a date until she wraps up filming for season eight of Thrones, which will air in 2019.