The 67-year-old country music icon has been secretly booked to fill the Glastonbury Legends slot on the Sunday of the UK festival, reported Independent online.
"Dolly is perfect for the Sunday Legends slot. It didn't take any convincing - she's always wanted to play Glastonbury," a source said.
The '9 to 5' hitmaker is expected to perform a setlist comprising her greatest hits from her lengthy career when she takes to the Pyramid Stage at Worthy Farm in Somerset, South West England, next June.
"It is being kept free deliberately. She'll get a helicopter straight down on Sunday, or maybe even Saturday night after the show," the source added.
Arcade Fire were the first act confirmed to headline Glastonbury last week, with the indie rockers announcing the news by posting a picture online spelling out four dates for next summer, including the legendary three-day summer festival.