Icelandic actor and bodybuilder Hafþór Júlíus Björnsson, who became famous for his role as Hora in the popular series Game of Thrones, and his partner Kelsey Helson are going through a difficult time. The couple lost their premature daughter, Grace Morgan Hafthorsdottir. The girl was born on Wednesday, November 8 at 22 weeks’ gestation.

Björnsson and Helson shared the tragic news on Instagram, where they posted heartbreaking photos with their family.

“It is with great sadness that we announce the birth of our daughter after 21 weeks of gestation. “After his movements weakened significantly, we found that his heartbeat had stopped.” they wrote in an Instagram post.

The parents described their pain, but also the joy of being able to spend time with their daughters. “She is beautiful, with blonde eyelashes and eyebrows,” together broken parents. “The sadness we feel will always be with us forever, and so will love. All our hopes and dreams for him have been taken from us, but I know that I will see him again someday. His spirit lives on through us and his brothers.” he added Bjornsson.

The actor, best known for his role as knight Gregor “The Mountain” Clegane in Game of Thrones, asked fans to respect the privacy of himself and his current partner. “Thank you for the kind words and support,” Björnsson concluded.

More than 25,000 condolence comments appeared under the post on Instagram. A number of famous faces also offered their condolences, including internet entertainer Arron Crascall and American actor Terry Crews, who starred in the comedy film Someone Likes Blonde. “This is heartbreaking. My prayers and thoughts are with your family. Sending love,” wrote one of the most famous crossfit athletes, Brooke Wells.