Maisie Williams
Maisie WilliamsCreative Commons/ Suzi Pratt

"Game of Thrones" actress Maisie Williams, who plays Arya Stark on the HBO drama, lashed out at British Airways for refusing to let her use the business-class lounge.

Taking to her Twitter account, Williams, 17, questioned the airlines' policy of not letting lone passengers under 18 enter the business lounge.

"Denied from the business lounge once again for being under 18 and without an adult... @British_Airways sort your s**t out," she tweeted.

Williams added: "I'm not saying I deserve special treatment. Just saying if 16-18 yr olds are grown up enough to travel 5,400 miles around the world I'm sure we can handle sitting quietly in the damn lounge."

An airline official tried to appease the actress, tweeting that they were just following the airlines' policy. But Williams refused to let the matter go, asking why an under-age person can travel alone, but not use the lounge.

The reason for British Airways' policy is primarily because it offers a self-service complimentary bar stocked with alcohol, and the bar is not always monitored by staff members.

Williams will now have to wait nine more months to use the British Airways business-class lounge, when she turns 18 on April 15.

Williams was not alone in expressing her displeasure at the British Airways. She found a supporter in singer Ed Sheeran, who tweeted: ''Ah British airways. You failed again.''

Fans of the actress, too, have been giving her alternatives to British Airways.

Williams' "Game of Thrones" character, Arya, was last seen sailing off on a ship heading to Braavos, leaving The Hound to die.

She is expected to commence shooting for season five sometime next month, and Williams told the Daily Star that everything about the show was top secret this time around.

"There was a rumour we would get the scripts last week, but we didn't. We usually get them for two or three episodes at a time, so I always flick through them straight away," Daily Mail quoted the actress.

"We've done well so far as nothing has ever been massively leaked," she added.