Scarlett Johansson, Robert Downey Jr. and the rest of the all-star Avengers cast stepped out in London last night for the UK premiere. The actors are making their way around the globe prior to the May 4 US release of the action adventure (it opens in Australia on April 25). It was a special evening for dad-to-be Chris Hemsworth, who was joined by his Hoss Intropia-clad wife Elsa Pataky. The couple are expecting their first child in the coming months, though they've decided to keep the baby's gender a secret. Robert might be able to give Chris some parenting tips — RDJ and his wife Susan welcomed son Exton in February.
Scarlett opted to break away from the sexy LBDs she's been wearing and instead chose a floral embroidered Prada frock. Scarlett was the only female cast member to make the trek to Moscow for the Avengers screening, but last night she was joined by her partner in fighting crime, Cobie Smulders. Cobie dazzled in a formfitted floor-length Alexandra Vidal red gown.