Original singer Les McKeown yesterday vowed to don the tartan trews and lead a karaoke sing-song of the group's famous hits at the convention.
McKeown, 58 said he was looking forward to celebrating with fans from around the world in his home city and raise money for charity.
He said: "I'm looking forward to coming and having a bit of fun - let's leave the sanity at the door."
The Bay City Rollers sparked hysteria when they burst onto the music scene in the 1970s, but Les said it wasn't time to say 'Bye, Bye Baby' just yet.
He refused to rule out rumours that former bandmate, bassist Alan Longmuir, will make a rare public appearance at the convention.
The event is held aid of the Sick Kids Friends Foundation and will be held at Crowne Plaza Roxburghe Hotel, in Charlotte Square, Edinburgh, on July 20.