Crowds gathered in Flag Market to pay their respects to the father-of-four, who died from cancer on September 28, as the funeral cortege made a special visit to his famous Guild Tram outside the Harris Museum.
Hundreds of people clapped in unison as his coffin, adorned with white and red roses, passed by his much-loved food stall at 10.50am.
Family, friends and customers shared their fond memories of Mr Roberts, whose baked potatoes and traditional parched peas were a fixture of the city's Flag Market for decades.
A family friend, Stephen Geraghty, from Preston, said: “Everyone who knew Keith had amazing things to say about him.
"My brother was one of Keith’s best friends and I knew him through family. Everyone calls him a legend and he was in every sense a legend in Preston and loved by many.
Another family friend Karen Holland added: “We had been good friends with Keith for the best part of 31 years.
"His death is horrible, he was too young, but his legacy will live on.
"Hopefully, someone will take over that van and keep his famous hot potatoes going."
You can read our tribute to Keith Roberts here.
5.
Mr Roberts had been a friendly and familiar face in the city and drew many loyal customers for his famous spuds and traditional Lancashire parched peas from his Guild Tram on Flag Market
6.
Preston born and bred, Keith Roberts grew up in Holme Slack and went to Corpus Christi R.C. High School before following in the footsteps of his father, Keith Snr - Preston's original 'spud man'
7.
Keith's food cart became a fixture in Preston and his death has led to hundreds of tributes from those who enjoyed tucking into his hot potatoes and parched peas on a visit to the city
8.
Family friend Stephen Gerraghty, from Preston, said: "Everyone who knew Keith had amazing things to say about him. Everyone calls him a legend. And he was. He was in every sense a legend in Preston and loved by so many people."