Even though they haven't shared a scene together since season one, the pair—who play sisters Arya and Sansa Stark—have remained close throughout the series' lengthy run. During a 2013 Emmys panel, Williams revealed that she knew there was something special about Turner after their very first audition together.
"I had gotten along really really well with Sophie and I just remember her being super tall," she said. "I came out of the audition and said to my mum, 'Even if I don't get the part, I really want that girl to. She's really cool."
Carpool Karaoke? They're doing it as a pair, because their bond seems to have only grown stronger since those early Thrones days, with both often showing their love for each other in interviews and on social media.
Here are the some of the best times that Williams and Turner proved #Mophie is friendship goals.
13. The time they took a face-swap selfie:
12. When they looked flawless together at the 2017 SAG Awards:
11. The "Maisie Turner" Twitter exchange when they pretended to play house as a married couple:
10. When Williams asked fans for young Mophie photos, and they immediately delivered:
9. This display of sisterly love at the 2017 BAFTA Tea Party:
8. When they announced that a Game of Thrones Carpool Karaoke was coming:
7. The Sansa-Arya reunion pitch at Comic Con 2014:
6. Their reaction to Arya's emotional homecoming:
5. Williams' 21st birthday message to Turner:
4. When they wore matching Halloween costumes:
3. The time Turner carried Williams' dress train down the 2017 Golden Globes red carpet, prompting Anna Kendrick and fans to swoon:
2. When they got matching Game of Thrones tattoos:
1. And last but certainly not least, when they celebrated the one-year anniversary of their shared tats: