The 25-year-old actress was spotted downing a pint of beer as she watched US singer Taylor Swift at London’s Hyde Park on Saturday evening.

Looking casual in a black, white and grey striped top, Emma looked happy and relaxed as she enjoyed some alcohol with friends.

Her hair was pulled back into a side plait and she completed her look with dark red lipstick as she giggle with her pals.

At one point, Emma was so keen to make the most of her alcoholic beverage that she was seen making sure she consumed every last drop.

She and her friends then proceeded to take plenty of selfies as they waited for 25-year-old Taylor to take to the stage for her British Summer Time Concert.

A few hours earlier Emma had re-tweeted Taylor’s message about America’s gay marriage act, which was implemented via the Supreme Court at the weekend.

“And you can want who you want… Boys and boys and girls and girls,” she posted on the social networking site.

Other stars who headed to Hyde Park to see Taylor in action included former Spice Girls Emma Bunton and Melanie Chisholm.