"Game of Thrones" star and strongman legend Thor Björnsson just shared devastating news ... his daughter passed away this week after his wife suffered a delayed miscarriage.
Björnsson and fitness model Kelsey Henson announced they were expecting their second child together last month -- due in March 2024 -- but tragically, she suffered a stillbirth.
"It is with great sorrow that we announce the birth of our daughter, Grace Morgan Hafthorsdottir born Nov 8th at 21 1/2 weeks gestation," the 34-year-old said on Instagram.
"After a noticeable decrease in movement we found out her heart had stopped beating.