It was all about cute couples, playful poses, and supersexy dresses at the LA premiere of Avengers: Age of Ultron on Monday night. Chris Hemsworth and Elsa Pataky had the look of love on the red carpet, as did Robert Downey Jr. and his wife, Susan. New mom Scarlett Johansson arrived solo, showing lots of leg in a strapless Stella McCartney dress; the actress has been flaunting her enviable postbaby body since giving birth to daughter Rose in September with recent appearances at the Oscars and the MTV Movie Awards .
