The singer will be the headline act at the Royal Windsor Horse Show in May, which is a celebratory equestrian pageant that will feature music acts and riders.
Boyle will be joined by Katherine Jenkins, Il Divo and Michael Buble at the show, which will be screened on ITV as part of its programme The World Comes To Windsor.
A source told The Sun: "This show will be a major highlight of the Queen's Diamond Jubilee celebrations. Susan is a huge global star and it's a great booking for such a prestigious event."
Boyle recently told Digital Spy that she would like to record duets with Adele, Lady GaGa and Kings of Leon.
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Watch the music video for Susan Boyle's 'Autumn Leaves' below: