Sophie Turner is famed for playing Sansa Stark, the fiery red-head from Winterfell in HBO's hit series Game of Thrones.
But the actress recently took to Instagram to share a picture of a makeover, in which she has dyed her hair platinum blonde.
If any other celeb did this, fans would simply shower them in compliments. But Game of Thrones fans need answers, especially because all Turner said about the makeover was: "I did a thing".
In the few days the post has been live, it's racked up more than 10,000 comments with many of those being questions about what the new hair colour means.
One fan, spotting a similarity between Turner's new colour and that of the show's Daenerys Targaryen, wrote: "Maybe Jon isn't the real Targaryen. Maybe it's Sansa after all" - referencing the popular fan R+L=J fan theory.
However, in a 2014 interview with Marie Claire, the 20-year-old said she was naturally blonde anyway.
But that doesn't let her off the hook either, because another fan wrote: "Does this mean that Sansa will die in the next season?".
Fans will have to wait to find out as the next season of Thrones has been delayed until mid-2017 - rather than its usual April release - to account for the weather.