Celebrity Pictures: Matt Smith, Karen Gillan, Rita Ora, more

Today's (August 28) celebrity pictures includes Matt Smith performing his signature pose, and Karen Gillan at the BBC America premiere of 'Asylum of the Daleks' after arriving in Back to the Future's original DeLorean sports car.

Also in the Big Apple, a bearded Jake Gyllenhaal arrives for his appearance on The Late Show with David Letterman, a stylish Ashley Olsen runs errands in the city and Amber Heard takes a break from filming Paranoia with her puppy.

Meanwhile, Portia de Rossi and Ellen DeGeneres go for dinner in Los Angeles, and across the pond in Kildare, Ireland, Ronan Keating leans against a pink golf buggy for the 13th Marie Keating Foundation fundraiser.

And in London, Rita Ora arrives for her appearance on BBC Breakfast in a pair of Henry Holland sunglasses, and Fearne Cotton shows off her baby bump as she arrives at the BBC Radio1 studios carrying a cake tin.

Copyright: Rex Features Startraks Photo/Rex Features