Musician Stevie Wonder is set to walk down the aisle with girlfriend Tomeeka Robyn Bracy on 17 June, says a source.
It is expected to be a star-studded beachside ceremony in Jamaica, reports aceshowbiz.com.
Singers Elton John and Sam Smith are among Wonder's close friends who are expected to attend the wedding ceremony.
This will be his third wedding. The Isn't she lovely hitmaker was previously married to Syreeta Wright from 1970 to 1971 and Karen Kai Millard Morris from 2001 until 2012.
According to a guest, "It is going to be a huge, incredibly fun wedding and Stevie is flying out all his nearest and dearest".
"The guest list is pretty spectacular, and there will be a couple of surprise performances on the night," said the guest.
"Stevie has said he may well get up and perform a number, but hasn't said what song yet. There will be a huge party afterwards as well, and the whole day will be about love, laughter and family; Stevie is very close to his, and they will all have a role to play on the big day," the guest added.
The legendary singer, 67, and his 42-year-old girlfriend have two children together, with the youngest being born in 2014 and named Nia.
He has seven other children who were born to other women.
The Sir Duke singer's children will serve as bridesmaids and best men.