The 25-year-old singer - who got engaged to 32-year-old building firm boss Sam Cooper last Christmas Day (25.12.10) - has booked a church near her home in Central England for June 11 and plans to share her special day with just a small group of friends and family.
An insider told the Daily Mirror newspaper: "Lily doesn`t want a huge showbiz wedding, she`s simply not into all that any more.
"She and Sam are really happy and will marry near their Cotswolds home."
Lily and Sam got engaged while holidaying in Bali, just weeks after suffering the tragic loss of their unborn child when the `Not Fair` hitmaker was six months pregnant.
The `Smile` singer has been dating Sam since July 2009 and has previously spoken of how happy she is with him.
She said: "Sam treats me differently. He`s told me he`ll look after me forever. That`s what I`ve always wanted - someone to look after me.
"We`ve never had one argument and there`s nothing about him that annoys me."