At the after-party for the event, Turner found actor Jack Gleeson, who played her former fiance on the HBO series, and wrapped her arms around him as Jonas looked on in disbelief. "Awkward...." the 23-year-old actress captioned the Instagram pic.
Jonas then jokingly replied in the comments: "WTF, I thought this dude was dead... #KingJoffrey"
Turner and Gleeson have not worked together since the beginning of season four when Joffrey was killed off the show, and Sansa went on the run after being blamed for his murder.
As for her real-life relationship, Turner recently told ET that she had to have Jonas sign a non-disclosure agreement because he knew too much about this season of Game of Thrones.
"Joe was on set most of the time so he kind of figured it out and he was like, 'Can you fill me [in]?'" Turner shared while talking to ET’s Leanne Aguilera at WonderCon in Anaheim, California. "And, he signed an NDN, NDA and everything so it’s all good."
The eighth and final season of Game of Thrones kicks off on April 14.