The Weatherfield actress revealed that her character, who came out as lesbian two years ago, will enter a new relationship early next year.
However, Vincent refused to divulge whether Sophie's new girlfriend is a character already on the street or one from outside the cobbles.
"I can't reveal whether her relationship will be with a new character or an existing member of the street, but it will be with another girl," she told the Daily Star.
Reflecting on the groundbreaking plot, Vincent added: "There aren't actually many lesbians on telly, and Sophie and Sian were so young.
"But we made sure we didn't change our appearances or start acting any differently to meet the stereotype."