Watch: UFC’s McGregor fights Game of Thrones star

Conor-McGregor-Hafthór-Júlíus-Björnsson,-right,-known-for-playing-The-Mountain-Game-of-Thrones

UFC star Conor McGregor, left, spars with Icelandic actor Hafthór Júlíus Björnsson, right, known for playing The Mountain on HBO's Game of Thrones.

Speed versus strength. Cunning versus brute force. Diminutive UFC star in spandex versus enormous TV star in jeans.

In a video posted Saturday, interim UFC featherweight champion Conor McGregor participated in a sparring session with Icelandic actor Hafthór Júlíus Björnsson, known for playing The Mountain on the HBO hit Game of Thrones.

McGregor, who stands 5-foot-8 and competes at 145 pounds, stood opposite Björnsson, a professional strongman listed at 6-foot-9 and 400-plus pounds, at Straight Blast Gym in Ireland.

Björnsson has won either bronze or silver in the past four World’s Strongest Man competitions and was named Europe’s Strongest Man the last two years. He is also a former professional basketball player.

McGregor is preparing for his anticipated title unification bout with Jose Aldo, which is scheduled to headline UFC 194 on Dec.12 in Las Vegas.

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