Mumbai, Aug 27 (IANS): Karisma Kapoor is extremely proud of her sister Kareena Kapoor, whose career is shaping up pretty well and feels that "Heroine" will be a milestone in her acting journey.

The film's promos, including the item song "Halkat Jawani", has been released and Karisma says: "It is a wonderful song and the promo of the film 'Heroine' is also looking very good. I am looking forward to seeing the movie."

"I feel that 'Heroine' will be Kareena's best performance. In fact, it will be the best," she added.

Coming out Sep 21, director Madhur Bhandarkar's "Heroine" revolves around ups and downs in an actress' career. Kareena plays the title role and the cast also features Arjun Rampal and Randeep Hooda.

Asked when both sisters will be seen together on screen, Karishna said: "We both have not yet come across any such script. If we get a nice script where both of us have a good role to play, then we will work together. Let's see who comes up with a nice script."