Peter Smith-Robinson, 27, dropped to one knee during the weekend shopping rush at Exchange Square in Manchester, England, and shoppers watched him on the marker's big screen as he popped the question to girlfriend Abbigail Burke, 26, the Manchester Evening News reported Monday.
Burke, who quickly accepted the proposal, said the moment was "like a dream."
"I wanted to cry but I couldn't as so many people were watching," she said. "It was just so romantic."
Smith-Robinson said the Christmas markets "are a very special place" for the couple.
"I was quite confident she would say yes because we are so close but when she actually did it was just amazing," he said.