According to pair of pics, Hill, 53, dressed up as the menacing, blue-skinned Night King. Meanwhile, their youngest daughter, Audrey, 19, went as Sansa Stark, Maggie, 22, came as the sword-swinging Jamie Lannister, and Gracie, 23, dressed up as the young King Joffrey Baratheon.
McGraw, 53, also got in on the dress-up fun, donning a fur robe and thick fake red beard to transform into Tormund Giantsbane.
McGraw and Hill then embraced their love of fantasy fiction on Tuesday, when the country singer shared a photo from yet another costumed night of family fun -- this time, dressing up as Harry Potter characters.
"Harry Potter night. Who is who?" McGraw captioned the fun photo, showing all the family members decked out like different characters from the fantastical wizarding world of the Potter universe.
"It's been so much fun because our three daughters have been home with us for the last month," he marveled. "This morning our two California girls left to go back home, but Audrey's still here. And we had a month of just staying here at the house... The girls set the table outside every night and made big meals. It's nice to sit with your daughters, having a glass of wine and talking about politics and getting into these political arguments and discussions, and playing these games."