The 23-year-old pop star and the 36-year-old singer-songwriter will share the stage together for the first time performing a currently unknown song live at the ceremony at The Staples Center in Los Angeles.
The Recording Academy tweeted the exciting news on Wednesday (07.02.19), writing: ''@ladygaga, @MarkRonson, @DUALIPA, @st_vincent, @chloexhalle, @trvisXX, @YolandaAdams, Fantasia (@TasiasWord), and @AndraDayMusic are set to take the #GRAMMYs stage this Sunday! (sic)''
'New Rules' hitmaker Dua - who is nominated for Best New Artist and Best Dance Recording for her Sin City (Mark Ronson and Diplo) collaboration 'Electricity' - also revealed she was busy rehearsing with the 'Digital Witness' singer, adding to her own account: ''Grammy rehearsals with @st_vincent see you all on Sunday night @RecordingAcaemy (sic)''
Lady GaGa and Mark Ronson are also billed to perform, with a performance of a song from the 'A Star Is Born' soundtrack likely, as 'Shallow' - which they co-wrote with Andrew Wyatt and Anthony Rossomando - is nominated for Best Song and Best Song Written for Visual Media.
Bradley Cooper - who plays Gaga's alter-ego Ally's lover Jackson Maine in the movie and also helmed the musical adaptation - usually performs vocals, but he's due to attend the BAFTAS in London that night.
Travis Scott and Chloe x Halle have also been added to the line-up.
Kacey Musgraves, who is nominated four times, and Dan + Shay, who received a nod for Best Country Duo/Group Performance, will also hit the stage.
Miley Cyrus and Shawn Mendes are also reported to be performing a secret single they've been working on for the first time at the ceremony.
The former shared a series of pictures from her rehearsals space for the Grammys on Instagram recently, and eagle-eyed fans of the Canadian pop star noticed that his name was written on some of the equipment behind her.
Miley captioned the post: ''Gram Gram rehearsals! Performing this Sunday at the @recordingacademy ! (sic)''
And TMZ has since reported that they are in fact collaborating on a single.
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