Celebrity pictures: Carey Mulligan, Elizabeth Olsen, 'American Pie'

Today's celebrity pictures include a famished Jason Biggs taking a huge bite out of a pie to promote American Pie: Reunion along with co-star Tara Reid in Sydney, and a rotund Jamie Oliver attends the opening of Jamie's Italian restaurant Down Under.

In New York, an incognito Carey Mulligan buys coffee for two and starlet Elizabeth Olsen attends the Silent House premiere.

Meanwhile in Los Angeles, One For The Money actress Katherine Heigl goes shopping, former Disney star Ashley Tisdale runs errands and Amy Poehler arrives for the Parks and Recreation screening as part of PaleyFest 2012.

And in London, TOWIE star Lauren Goodger arrives at Aura nightclub in Mayfair, Aussie supermodel Elle Macpherson attends the Rodial BEAUTIFUL Awards 2012 at the Sanderson Hotel and Florence + the Machine perform in Nottingham.