• FANTASTIC FOUR photo | Colin Firth, Emily Blunt, John Krasinski

Credit: Charley Gallay/Getty

Published: Thursday February 23, 2012 17:00 PM EST



Colin Firth and wife Livia mingle with Emily Blunt and John Krasinski while hosting a Ermenegildo Zegna and Vanity Fair benefit dinner – in support of Oxfam America and Livia's eco-friendly initiative the Green Carpet Challenge – at L.A.'s Chateau Marmont on Wednesday.