Emily Blunt has become a US citizen. The British actress obtained her citizenship at a VIP legal oath ceremony in Los Angeles on Tuesday. It comes five years after the 'Into The Woods' actress married her Massachusetts-born actor husband John Krasinski. According to UsMagazine.com, Blunt - who was born in London - was spotted leaving the courtroom holding Krasinski's hand. Meanwhile, the day after becoming a US citizen Blunt and her husband attended the secret wedding of Jennifer Aniston and Justin Theroux. The happy couple tied the knot at their $21 million Bel Air home in Los Angeles on Wednesday evening.