Chandler, Rachel, Joey, Monica, Ross and Phoebe are expected to appear for the two-hour special on NBC next month.

The US network announced the news at the Television Critics Association's press tour in Pasadena on Wednesday.

It is hoped all the original cast members - Matthew Perry, Matt LeBlanc, David Schwimmer, Jennifer Aniston,
Courteney Cox and Lisa Kudrow - will take part.

NBC chief Robert Greenblatt told reporters: "I'm hoping all six will be in same room at same time.

"I'm not sure we can logistically pull it off."

After the announcement, LeBlanc tweeted: "Should be a good time!"

There have been several TV mini-reunions with a few cast members since the hit sitcom ended in 2004 after 10 seasons, but never all six.

The upcoming curtain call will be a tribute to famed comedy director James Burrows, who also produced the likes of Taxi, Frasier and Cheers.

The special will air on Sunday 21 February.