The EastEnders actress, 27, was with her partner Sam Arnold for seven years, with him cheering her on as she lifted the glitterball trophy alongside dance partner Giovanni Pernice last year.
The Olympic swimmer is the latest in a long line of celebrities whose relationships were brought to an end by the dance show, where couples spend hours training and performing together.
Adam Peaty and Eirianedd Munro announced they had split in an Instagram post on Wednesday morning with the Olympic swimmer saying sorry for letting her down.