Sophie Turner and Maisie Williams epitomize what it means to be best friends.
The "Game of Thrones" actresses met when they were both cast on the hit HBO show to play sisters and have been besties ever since. They even have a friendship name: "Mophie."
Whether they are goofing off on-set or off, it's a joy to watch their friendship.
Here are eight moments where these two have proven they are "soul mates."
They have matching tattoos.

The two hit up a tattoo parlor and got 07.08.09 tattooed on their inner arms. The numbers stand for August 7, 2009, the date the actresses both learned they were cast on "Game of Thrones." The date is written on their arms the way it is in the United Kingdom, with the day before the month. They still celebrate the anniversary with cute throwback photos and messages on their social sites.
They are "soul mates."

When INSIDER spoke with Turner at the season seven red carpet premiere, she called Williams her "best friend, my soul mate." Even when they weren't filming together, they would still have sleepovers and hang out.
They are always willing to lend a helping hand.

When Williams was posing for photos at the 2017 Golden Globes, Turner got down to help spread the train of her dress out on the red carpet. The sweet moment was captured on camera.
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