Last updated on: July 30, 2025
Stormur Magni Hafthorson is Hafthor Julius Bjornsson’s son. Hafthor is an Icelandic strongman and actor who is well known. People commonly refer to him as “The Mountain” from the television show Game of Thrones. Stormur’s mother, Kelsey Henson, is a Canadian fitness trainer and social media influencer.
Stormur was born on September 26, 2020. He is the joint first child of Hafthor and Kelsey. His full Icelandic name is Stormur Magni Hafþórsson, “Son of Hafthor.” That is how names are given in Iceland — kids usually have their dad’s first name with “-son” or “-dóttir” appended to the end.
Quick Facts About Stormur Magni Hafthorson
| Full Name | Stormur Magni Hafthórsson |
| Birthdate | September 26, 2020 |
| Occupation | N/A |
| Husband/Wife | Not Married |
| Education | N/A |
| Age | 5 years and 2 months old |
| Parents | Hafþór Júlíus Björnsson (father), Kelsey Henson (mother) |
| Siblings | Theresa Líf (half-sister), Grace Morgan Hafþórsdóttir (stillborn sister) |
| Children | N/A |
| Net Worth | <$1 million |
A Special Beginning
Stormur was born in Iceland. He was 3,530 grams and 52 centimeters long. Hafthor posted the joyous news on social media. He described Stormur as a healthy, strong boy and referred to it as the best day of his life.
Stormur was later baptized at the same church where Hafthor married Kelsey. It was a beautiful, private family moment.
Meaning Behind His Name
His name is also very meaningful. “Stormur” is storm and “Magni” is mighty or strong. This completely fits, particularly because his dad is famous for being one of the strongest men in the world. A lot of fans adore the name because it is both distinctive and strong sounding.
Life with a Famous Dad
While Hafthor is powerful and well-known, he’s a doting dad too. He frequently shares Stormur’s photos on Instagram. He comments on how quickly Stormur is growing and how clever and joyful he is. On one occasion, following a weightlifting competition in 2022, Hafthor rushed off stage to give his son a hug. The fans enjoyed this sweet moment. It demonstrated how much he loves Stormur.
Although his parents are famous, Stormur’s life is largely private. His dad and mom post updates occasionally but guard his privacy as well.
Stormur has a half-sister, Theresa Líf. She is Hafthor’s daughter from a previous relationship. He also had a younger sister called Grace Morgan Hafthorsdottir, who was born still in 2023. Stormur was thrilled to become a big brother and even displayed the ultrasound photo in one of his dad’s Instagram posts.
That had been a sad period for the family after losing baby Grace. Nevertheless, they continue to love one another and also share lovely moments online.
READ ALSO: Hafthor Bjornsson Net worth, Age, Wife, Family, Facts & More
His Family Roots
Stormur hails from a robust and close family. His grandparents on his father’s side:
Bjorn Thor Reynisson (grandfather)
Ragnheidur Margret Juliusdottir (grandmother)
He also has two aunts, Hafdis Lind Bjornsdottir and Bryndis Bjorg Bjornsdottir. They are proud of their Icelandic roots and culture.
Celebrating Milestones
Stormur is only just 4 years old now, turning in 2024. Hafthor shared a sweet birthday message stating how proud he is to be Stormur’s dad. The family celebrated and had joy, and fans also shared nice wishes.
Although only a little boy, Stormur has become dear to many. Fans love seeing little bits of his life and seeing him grow up.
