The 40-year-old actress, who was last seen in 2012 supernatural thriller film 'Dangerous Ishq', said she and Kareena share a strong bond.
"She is my sister and we are very close. I think she is more of a friend to me than just a family member. We share a great bond and she is a blessing in my life," Karisma told PTI in interview.
The 'Zubeidaa' actress, who had a successful career in 90s' and 2000, says it has been a rare instance when two sisters have successfully worked in the same decade.
Though they share a close bond as sisters personally, Karisma says professionally they never interfere in each other's decision.
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Asked if she is worried that Kareena is rejecting many film offers after marriage, Karisma supported her sister.
"She is married and wants to pick and choose the work she is doing. It is completely her choice. She is been that kind of person. I think, right from her first film, she has done whatever she has wanted to do in her life, and I think that is the kind of person she is and we respect that."
"I am a kind of parent who will let them do whatever they want to do in life. Whether they want to be an actor or not be an actor. I would never enforce anything on them," she said here on the sidelines of the NDTV-Diageo Road To Safety, a campaign to make Indian roads safer.