The film -- starring Robert Downey Jr., Chris Evans, Scarlett Johansson, Chris Hemsworth, Jeremy Renner, Samuel L. Jackson and Mark Ruffalo -- hits theaters May 4, 2012
Director Joss Whedon was pleasantly surprised by Scarlett Johnasson (photographed with Jeremy Renner and Chris Evans). "She's funny! She's smart and delightful," he tells Us. "The only problem I ever had is I'm like, 'Can everyone stop being entranced by Scarlett so we can shoot the movie again?' Myself included."