The rumored couple will next be seen together shaking a leg in the upcoming seventh season of the dance-based reality show.
Karishma has appeared in shows like "Kyunki Saas Bhi Kabhi Bahu Thi", "Comedy Circus Maha-Sangram" and "Baal Veer". She will also be seen alongside actress Sunny Leone in "Tina and Lolo".
Meanwhile, Upen, who has played supportive roles in films like "36 China Town", "Namastey London" and "Ajab Prem Ki Ghazab Kahani" was last seen in Tamil romantic thriller "I".
"Nach Baliye 7" will be aired on Star Plus.