According to NDTV Movies, Sharma plays Akira, a journalist with the Discovery Channel, shooting a documentary entitled The Man Who Cannot Die.
Introducing herself as the character, Sharma said: "Hi. I am Akira. I work for the Discovery Channel. And I am on a quest to discover the truth behind the compelling story of The Man Who Cannot Die."
Shah Rukh Khan plays Samar, a bomb disposal expert in the non-militarised region of Kashmir and is the subject of the documentary.
It was recently announced that a song sequence due to be shot in Switzerland featuring Khan and Katrina Kaif would now not have a video filmed, following Yash Chopra's death. The song will now be used during the film's end titles.
Sharma made her debut with Shah Rukh Khan in Yash Raj's Rab Ne Bana Di Jodi.
Jab Tak Hai Jaan will release on November 13, following a gala premiere in Mumbai on November 12.
Watch Sharma in the song 'Jiya Re' from the film below: