Robert Downey Jr. says Marvel fans are "really good" for his ego. The 'Avengers: Age of Ultron' star, who plays Iron Man in the franchise, created a frenzy at the movie's European premiere at the Vue Cinemas in the Westfield, London last night, but thinks it's time he "passed the torch" on to his younger co-stars. Asked about the adulation, the 50-year-old star joked to BANG Showbiz: "It's really good for my ego because I'm so introverted. "But look, all that matters is that I think we made a better movie this time. I didn't know that we could do that, but the fans won't be disappointed. "It's about time I passed the torch [to other Avengers] - it's been getting hot in my hands." Other stars at the premiere included Scarlett Johansson, Chris Hemsworth, Jeremy Renner, Elizabeth Olsen, Mark Ruffalo, Paul Bettany and Chris Evans.