Iron Man star Jon Favreau has joined the cast of Solo: A Star Wars Story in an as-yet unannounced role. On Twitter, Solo director Ron Howard announced that Favreau will provide voice work for an alien character in the film. The Tweet includes a photo of Howard standing beside Favreau and screenwriter Lawrence Kasdan.

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Favreau has had his hands in multiple sci-fi projects for over a decade. He is, of course, known for his role as Happy Hogan in the Marvel Cinematic Universe; his character debuted in Iron Man, which he also directed, and was most recently spotted in Spider-Man: Homecoming. He is also slated to appear in Avengers: Infinity War and its untitled sequel. While he wasn't starring in these sci-fi franchises, he was working with Disney to direct a live-action reboot of Jungle Book.

Beyond his work with Disney, Favreau has another existing connection to Solo: Donald Glover. Glover, who will appear as Lando Calrissian in Solo, is set to star as Simba in Favreau's live-action remake of the 1994 animated film. As Howard points out in his Tweet, Favreau is directing the star-studded reboot.

Based on a script by Lawrence and Jon Kasdan, Solo: A Star Wars Story stars Alden Ehrenreich as Han Solo, Donald Glover as Lando Calrissian, Joonas Suotamo as Chewbacca, Emilia Clarke, Thandie Newton, Phoebe Waller-Bridge, Michael K. Williams and Woody Harrelson. The film arrives May 25, 2018.