Hafþór will appear in three episodes in total and can be seen in wielding a sword at the 01:25 minute mark in the new season trailer.
Although Hafþór filmed his scenes in Croatia this past fall, the series’ cast and crew are no strangers to Iceland.
The show’s cast and crew, roughly 300 people stayed in Iceland last summer to film for the series.
Locations included Þjórsárdalur, the Hengill area and Stekkjagjá at UNESCO heritage site Þingvellir, for which the crew received special filming permission from the Þingvellir Committee.
Game of Thrones will premiere in the U.S and Iceland in April.
To watch the trailer click here.