The 26-year-old actress was speaking at the launch of Khalid Mohamed's 'Two Mothers And Other Stories', NDTV reports.
"You know I think I am too young and inexperienced and I don't know if I have the talent to write, but you know everybody is narcissistic.
"I would like to write about my life one day or the other. I am an actor after all, but I don't know if right now I will be able to," explained Kapoor.
The Players star, who is widely regarded as a fashion icon, said she would not focus on fashion in the book.
"Clothes and style is just my personal choice. It is not something I am obsessed with. Maybe [I would write about] romance," she said.
Kapoor will be seen in Rakeysh Omprakash Mehra's Bhaag Milkha Bhaag opposite Farhan Akhtar.
Watch the trailer for Kapoor's Players below: