Now we can't ~confirm~ for sure but they seem to be more than friends IRL if their pictures and Twitter exchanges are anything to go by.
Which is ironic as their characters' mother had a thing with her brother.
Their social media photos show that they're pretty damn close.
Not only are they best friends with Bran Stark (Isaac Hempstead Wright).
my besties @Dean_C_Chapman @nelltigerfree (aren't they so cute?)
But they also spend all of their free time together, even though Myrcella is no longer in the show.
Apple crew in Brighton @Dean_C_Chapman @IsaacBranFlakes
Like this week, for example, when they all went on a camping trip together.
Myrcella also calls Tommen "my boy" on Twitter.
My boy be lookin like a serial killer 😂😂😂😂😂
@nelltigerfree Your boy? is your boyfriend?
@nelltigerfree don't get me wrong but do you guys dating? i think you look cute together
@Inna_Phk Nell is dating with Dean? (Sorry for my bad english) :-)
@nelltigerfree @Dean_C_Chapman are u going out orrrr
They tell each other how much they miss each other when they're not hanging out.
@nelltigerfree miss you toooo 💙
And it seems Nell's got Dean pretty well trained already.
@Dean_C_Chapman he loves me
I have him on whip @Dean_C_Chapman
They've even flown somewhere together this week.
Flying with this one @Dean_C_Chapman ✈️
@Dean_C_Chapman So cute #LannisterLove ah