The announcement was made on the official Star Wars Twitter page.
Fans will have to wait for more details to be released as the makers of the films are keeping things top secret so nothing gets given away.
It is believed the film will focus on what's been going on with Luke Skywalker, one of the biggest characters in the series.
The Last Jedi will take place directly after the events of 'Star Wars: The Force Awakens', which ended with Rey (Daisy Ridley) finding Luke. Will Luke be the last Jedi in the title?
But, fans will have to wait until December to find out exactly what this film has in store for Rey, Luke Skywalker and the rest of the rebels.
Star Wars: The Last Jedi will be released on 15 December 2017.

Edward James, 75, was convicted of fraudulent trading at Crown Currency Exchange, where he was a director.
He used new customer cash to pay off old clients for two years, Southwark Crown Court was told.
More than 12,000 people were left £20m out of pocket after the Cornwall-based firm collapsed in October 2010.
Three other people involved in the scam were jailed in June.
Crown Currency director Peter Benstead, 72, killed himself during the trial.
Benstead spent customer cash on a £900,000 luxury house in Penzance, a second home in the Dordogne and spent £36,000 on a seven week cruise.
Jurors were told James, who stood down as Tory chairman of Mendip District Council in the wake of the allegations, knew the dire state of the company.
Judge Michael Gledhill said James' public service to Glastonbury as mayor in 2009, "paled into insignificance" in comparison to his role in the frauds.

But in recent years it, like many other seaside towns, has struggled.
The advent of cheap flights abroad and a recession meant the County Antrim town was forced to reinvent itself from its 1950s heyday.
And while the weather this year has been as unstable as the political landscape, neither seem to be putting tourists off spending money, with more visitors from the Republic of Ireland providing a welcome revenue stream.
Visitors to the north coast traditionally come from other parts of Northern Ireland, said Naldo Morelli, managing director of Morelli's Ice Cream.
"But this year, I suppose with Brexit and the pound weakening a little bit we've noticed more customers from the Republic of Ireland, so that helps too," he said.
"The Northern Ireland public are very used to having four seasons in one day, so thankfully for us they eat ice cream no matter the weather."
Portrush's reinvention seems to be doing the trick for traders.
"Business is up 5% to 10% across the board, certainly the restaurants have been busy," said Ian Donaghey, the president of the Causeway Chamber of Commerce.
While the weather is not always kind, this is sometimes actually good for local businesses, added Mr Donaghey.
"If the weather is too good it keeps people on the beaches and they don't spend money in the town," he said.
"What some of the traders would tell you is that they like a sunny morning and a drizzly afternoon because it drives them into Barry's [amusement arcade] and the restaurants and bars."
Portrush's much loved amusements and bucket-and-spade shops are still there, but now their neighbours are trendy coffee shops, restaurants and bars.
The town may not have completely shaken off its traditional image, but those who visit do not seem to mind.
Business owners hope a mixture of nostalgia and new attractions will keep people visiting the north coast for the rest of this summer season, and for many years to come.
It seems that come rain or shine, holidaymakers will always have a soft spot for Portrush.
'Star Wars: The Last Jedi' will be the title of the latest instalment of the popular sci-fi series.
[NEXT_CONCEPT]
A former mayor of Glastonbury has been jailed for 42 months for his involvement in a foreign currency exchange scam.
[NEXT_CONCEPT]
The beauty of Northern Ireland's north coast made Portrush the go-to choice for family holidays for decades.