Her most famous screen character Princess Leia has always been something of a goody two-shoes.

But Carrie Fisher may have accidentally blown a major plot point after tweeting an image of a Sith-like costume she claimed she would be wearing in the so far untitled Star Wars: Episode VIII on Tuesday.

The saucy actress made the shock tweet on Tuesday, just a day after the world premiere of the long awaited The Force Awakens movie, though she soon deleted her teasing message.

Scroll down for video

Sith must be a mistake: Carrie Fisher shared an image of her supposed Star Wars: Episode VIII costume in which she looked very much like an user of the dark side of the Force

The 59-year-old said: 'Michael Kaplan Star Wars costume designer reveals front and back of my costume for Episode 8.'

He is shown holding two images of the slightly suggestive black Emperor-esque outfit, which show Leia holding her hands together in a prayer position while wearing a menacing stare.

Given her character is said to be as powerful in the ways of the Force as her brother Luke Skywalker, it would be no great surprise if she decided to turn to the dark side.

The image appeared to be shot inside a private plane, and around the same time she also shared an image of herself getting ready to board a jet covered in Star Wars livery as she continues her promotional tour.

See the latest Star Wars: The Force Awakens news on Carrie Fisher's Episode 8 tweet

Paying the Fisher price: Carrie will surely have got a grilling after making the tweet just a day after The Force Awakens premiere

Whoops: She will be regretting her hasty social media antics if she turns out to have blown a big secret

Many Leias of deception: Carrie has not even been confirmed a cast member for Episode VIII on IMDB yet

Of course the details of what will happen in the forthcoming film are being kept as a strict secret, so perhaps it should be no surprise the shock message was soon taken from the internet.

In fact Carrie is not even listed as being among the cast on the forthcoming film, with the only names officially taking part so far Mark Hamill, Oscar Isaac, John Boyega and Benicio Del Toro.

But given the esteemed actress turned author is also known for her wicked sense of humour, it could be the old rascal was only intended to pull everyone's collective leg by 'leaking' a hoax image, particularly given the costume's somewhat risque design.

Carrie's sense of humour was on display at Monday's premiere, where she delighted in hamming it up with aplomb for the gathered media, before an emotional red carpet reunion with her fellow members of the original trilogy's core cast, Mark Hamill and Harrison Ford.

A Jedi mind trick? She shared this photo of Michael Kaplan on a plane holding the slightly suggestive images

What a coincidence: She also tweeted an image of herself about to get on a jet covered in Star Wars livery

The trio celebrated another landmark moment in their careers at the premiere for Star Wars: The Force Awakens held at the Dolby, El Capitan, and TCL Theatres in Hollywood on Monday evening.

In 1977 the three actors changed the world of film forever as they teamed up with George Lucas for what would be one of the most influential and lucrative cinema endeavors of all time.

And with Episode VII of the franchise hitting theatres the trio are set to break even more records, with many experts predicting the film will shatter previous world box office numbers.

The three amigos: She shared an emotional moment on the red carpet with co-stars Mark Hamill and Harrison Ford at the Hollywood premiere on Monday