She famously got a matching arm inking with Sophie Turner after the pair landed their roles as the Stark sisters in HBO series Game of Thrones.

And Maisie Williams unveiled her new ribcage tattoo via her Instagram stories on Monday as she shared the heartfelt reason behind her inking.

The actress, 21, peeled back her shirt to reveal the Japanese inscription delicately etched into her skin beneath her bra.

Reason for being: Game of Thrones star Maisie Williams revealed the personal meaning behind her new ribcage tattoo... but it has NOTHING to do with the HBO series

Maisie coyly shared the meaning of her tattoo by hashtagging the snap #ikigai which is the Japanese word that translates to the 'reason for being'.

Ikigai is the thing that inspires you to get out of bed in the morning and considered to be the answer to living a more fulfilling life.

Pictured: #ikigai is the Japanese word that translates to the 'reason for being'

Maisie already has an extensive catalogue of tattoos including a daisy which refers to her production company and one that reads 'little rascal'.

The actress also has 'no one' penned on her skin which alludes to her feisty on-screen alter ego Arya Stark.

Back in 2009, Maisie landed the role of the boyish heroine alongside Sophie who plays her feminine sister Sansa Stark.

Having both found out they secured their parts in the series on August 7th 2009, they both always said they were going to get an inking as a permanent reminder.

The on-screen sisters got the 07.08.09 tattoos on their day off from filming the HBO series in Belfast in September 2016.

Revealed: Back in 2009, Maisie landed the role of the boyish heroine alongside Sophie who plays her feminine sister Sansa Stark

Sophie previously said of their tattoos at the time to ELLE UK: 'We always said that we wanted them so we got the date 07.08.09 on our arms because that's the date that both of us found out we'd got our roles in Game Of Thrones.

'So when we had a day off from filming in Belfast we just went to a tattoo place and got it done.'

Game of Thrones, which was a massive breakthrough for Maisie's career in the showbiz world, will be wrapping up the hotly-anticipated series this year.

Fans are on the final countdown to April 14 for season eight which will feature six episodes that are expected to be over 60 minutes in length each.

Ink-credible friendship: The on-screen sisters got the 07.08.09 tattoos on their day off from filming the HBO series in Belfast in September 2016

Recently, Maisie admitted some viewers won't be satisfied with the ending but she insisted she was really proud of the final season.

Of the end, Maisie told Sky News: 'I don't know that anyone is going to be satisfied. No one wants it to end, you know?

'But I'm really proud of this final season. I've always felt ashamed to say things like that, but I am.

'I'm really proud of all the work that we've put in. Yeah, for me it's like the right time. And yeah, I hope people like it.'