The British designer and retail expert is confident this summer's event will be even more impressive than last year's.
Vintage, which is being run by Wayne and his wife, Gerardine, will celebrates past decades of music, fashion, film, art, dance, food and design.
Mr Hemingway announced the programme highlights at the Old Fruitmarket in Glasgow yesterday.
He said: "We had a great time in Glasgow last summer.
"Dancing took place in the bars throughout the days and evenings and the sold out nightclubs were uplifting.
"The city sure knows how to party.
"This year, being part of the Commonwealth Games cultural programme, will allow us to explore international elements of vintage culture.
"This will ensure that it will be a one-off Vintage Festival and the team can't wait to deliver something that will live long in the memory."
The 13th Merchant City Festival is part of Festival 2014, the celebration running alongside the Commonwealth Games.
It will be one of three Live Zones that will transform the city from July 23 to August 3.
Councillor Gordon Matheson, Leader of Glasgow City Council, said: "We are delighted to welcome Vintage back to Merchant City Festival."