Other acts set to perform include Adam Lambert, Kylie Minogue, and more.
The album features all 14 ‘Born This Way’ tracks and six alternate versions reimagined by LGBTQIA+ artists and advocates.
The reimagined rendition will appear on Lady Gaga’s forthcoming release ‘Born This Way The Tenth Anniversary Edition’ out June 18.
The relief benefit special is scheduled for June 4 at 9 p.m.
From disco hits to tender ballads, the queer canon is as diverse as it is large. Here are the most memorable songs that celebrate the LGBTQ experience.
Of their collaboration, Olly Alexander said, "Kylie Minogue is an icon who has inspired me since I first started making music, so this feels out this world."
The money raised from the highly-acclaimed live stream will be split between the Lebanese Red Cross and Save the Children.
The much-acclaimed film will be playing in U.S. cinemas for one night only, on 7 January 2020.
The star said: “Every concert feels like a private party, I can see your eyes and feel your hearts. I’m coming to Glastonbury, with love.”
The soundtrack to the film will be released simultaneously on 5 July 2019.
Knight joins this year's other headline acts Lauryn Hill, Tears For Fears and Kylie Minogue.
The festival bill also includes Jessie J and Clean Bandit among other big names.
The '80s pop icons will be supported by post-punk five-piece White Lies and chart-topping synth-pop outfit Scritti Politti.
The string of European dates will see the 78-year-old synth-pop legend—who typically tours DJ sets—playing piano, vocoder, and synths with a live band and vocalists.
Now in its fourth year, BBC Music Day is an annual celebration of the power of music to change lives