The couple, who split in August after three years together, were photographed in Paris on New Year's Eve, the New York Post reports.
The pictures show the two together outside the Basilica of the Sacred Heart, posing for a photo on Kelly's iPhone and hugging outside the entrance steps.
Kelly was first rumoured to be back together with the Yankees baseball player in October, when Jeter met her for breakfast while in Miami around the time of the cancellation of Kelly's TV series Charlie's Angels.
The two were also spotted at the Musee d'Orsay as well as enjoying brunch on Friday.
Kelly was rumoured to be involved with her Charlie's Angels co-star Ramon Rodriguez in August.