Adele, Bono, Ed Sheeran and Sam Smith have signed up for Band Aid 30.

The trio will be joined by several other big names from the world of music, including Sinead O'Connor, Ellie Goulding and Coldplay's Chris Martin, to contribute to a recording of 'Do They Know It's Christmas?', which will celebrate 30 years since the original track was released while also raising vital funds to prevent the spread of Ebola.

At a press conference today (10.11.14), Sir Bob Geldof - who is organising the charity recording for a fourth time - said: ''It really doesn't matter if you don't like this song, it really doesn't matter if you hate all the artists. What you have to do is buy this thing.''

Recording of the single, which the 63-year-old musician joked was ''the worst kept secret this year'', will begin this weekend (15.11.14), and will include 'X Factor' alumnus Olly Murs and 'Pompeii' hitmakers, Bastille.

Other famous faces who will appear on the track include Jessie Ware, Foals, Underworld, Fuse ODG and Paloma Faith, while acclaimed artist Tracey Emin will provide the cover art.

U2 frontman Bono will also return for Band Aid 30, having featured in the original recording in 1984 alongside Phil Collins, David Bowie, George Michael and Sting.

The announcement comes just days after One Direction were confirmed to be part of the single.

Bob and Ultravox star Midge Ure also confirmed Rita Ora had been on-board for the fourth rendition of the track, but has since had to pull out due to contractual agreements with the BBC linked to her role as a mentor on 'The Voice'.

The single is set to be released on November 17, but Bob revealed the track will not appear on streaming websites until the new year, claiming ''I'm a Taylor Swiftian.''

It comes after Taylor Swift pulled her albums from music streaming service Spotify.