Ulliel, who tragically died at the age of 37 on January 19 following a skiing accident in in France, made his first appearance in the Disney+ series in episode three, which premiered April 13. The actor will appear in three more episodes of the series, which stars Oscar Isaac and Ethan Hawke.
As the episode's end credits rolled, a touching title card informed viewers: "In Memory of Gaspard Ulliel."
Ulliel plays Mogart, a charismatic art collector, who is good friends with Layla El-Faouly, played by May Calamawy. In the episode, he arrives shirtless on horseback for a meeting with Layla and Marc Spector (Isaac). Layla and Marc aim to confront Mogart about a sarcophagus in his possession, and eventually begin trading hands.
Despite the onscreen fisticuffs, Calamawy recently recalled the real Ulliel as gentle and hard-working.
"It's the true definition of a tragedy when I think of Gaspard," Calamawy told Entertainment Weekly. "He was so friendly and warm. We had a week together where we filmed this one scene, and he had a really quiet demeanor to him. But when you'd talk to him, he was really funny, and he was really committed to every moment that he was in. It was fun to work off of him because he gave so much."
Moon Knight marks Ulliel's final television appearance. His final acting role is the French film More Than Ever, co-starring Vicky Krieps, which is set be be released later in 2022.
Ulliel was best known for 2004's A Very Long Engagement. He also played a young Hannibal Lecter in 2007's Hannibal Rising and starred as designer Yves Saint Laurent in 2014's Saint Laurent.
He was the face of Bleu de Chanel, Chanel men's fragrance, for twelve years.
Ulliel will play Mogart in three additional Moon Knight episodes, premiering Wednesdays on Disney+.