Ariana Grande will be joined by a line-up of acts for her One Love Manchester benefit concert tonight the the Emirates Old Trafford cricket ground.
The show will be broadcast on BBC from 6.55pm.
The running order was released earlier today.
Take That will kick things off followed by Robbie Williams, Niall Horan and Little Mix. Things will then go stateside with Pharrell Williams and Miley Cyrus performing.
Justin Bieber will sing next, followed by Usher, Katy Perry, Coldplay and the Black Eyed Peas.
Ariana will then take to the stage and it's reported that she will also duet with Miley Cyrus.
All money raised from the benefit show will go to the We Love Manchester Emergency Fund, which was set up by Manchester City Council and the British Red Cross to help families and victims of the horrific attack.
Some of the acts have been sharing pictures on social media of them at the venue:
A post shared by Gary Barlow (@officialgarybarlow) on