He plays Duncan Idaho, a swordmaster of House Atreides and a mentor to Timothée Chalamet’s character, Paul Atreides.
He didn’t return for the much-anticipated 2024 sequel, though he will be reprising his role in Dune: Part Three, which is due to hit cinemas in December next year.
“This is the kick-off, Dune 3,” Momoa said in the video as he began shaving his face, dedicating the decision to the film’s director, Denis Villeneuve. “Only for you,” Momoa said.
He also used the headline-making moment to spruik his renewable aluminium water-bottle company Mananalu, which aims to eliminate single-use plastics.
The Game of Thrones star said he last shaved his beard to launch the brand in 2019, which coincided with filming for Dune.
“At that time, I think we were one of the first ones to release the aluminium bottle, and now, six years later, airports are banning single-use plastics, and all these positive things are happening,” he said.
“The goal is to eliminate waste and cut down on all the emissions.”