The Stark sisters are back together!

PEOPLE can confirm that on Friday,Game of ThronesstarMaisie Williamsarrived at theChâteau de Tourreauin Sarrians, France, whereSophie TurnerandJoe Jonaskicked off theirwedding festivitieson Thursday.

Williams, 22, and Turner, 23, have been longtime BFFs since their days on the HBO hit series, growing up together in the public eye while playing the respective roles of Sansa and Arya Stark.

Not only do the pair have matching tattoos commemorating the date they were both cast on the show, but Williams is even set to beone of two of Turner’s maids of honorfor the big day.

“My best friend Maisie, she and I have avery intense friendship, a friendship that I haven’t had with any of my other girlfriends before,” Turner recently toldDark PhoenixcostarJessica Chastainin a video fromVogueParis, adding toGlamour UK, “Maisie is definitely my protector and I’m hers, too. I know if anything happened — especially if it was onGame of Thrones, which it never, ever would — she’d go crazy and protect me. Maisie is my strong home.”

“Sophie knows too much about me to not be my friend,” she toldGlamour UK. “I can’t tell you the amount of times Sophie said, ‘Go to therapy,’ before I actually did. She really helped me through some messy breakups and some friend breakups. Whenever I’m like, ‘I need help! This is bigger than anything I can sort out on my own,’ Sophie is my point of call.”

Amy E. Price/Getty

700016770SP00021_Featured_S

At the time, a source told PEOPLE that they intend on throwing atraditional wedding ceremonyin Europe this summer, but “had to get married in the States tomake it legal.”

For the past week, the couple has been in France,exploring Parisas they prepare for their nuptials. Last Thursday, the newlyweds were spotted outside the Hôtel Costesafter dinner with friends. Days later, the twoposted the same sweet selfieof themselves about to share a kiss on a bridge over the Seine River, in front of the Eiffel Tower.

Joe Jonas and Sophie Turner.Sophie Turner/Instagram

Sophie Turner and Joe Jonas

Joe Jonas and Sophie Turner’s wedding venue: the Château de Tourreau in Sarrains, France.Splash News

Chateau De Tourreau

On Thursday, they arrived at the Château de Tourreau, their apparent wedding venue. According toTrip Advisor, the property is one of the most exquisite private estates in Provence, and is available for booking at approx. $4,656 a night. It stretches across 17 acres of land, filled with wide gardens, orchards, streams, and a 25 x 10 meter mirror pool. The home can sleep 29 guests, with 16 bathrooms and 16 bedrooms.

Their guests have been seen gathering there as well, including the groom’s brothers,Nick JonasandKevin Jonas, plus their wives,Priyanka ChopraandDanielle Jonas.

source: people.com