The model turned actress, who has adopted two daughters --Renee and Alisah-- was speaking at an event to celebrate her 20 years of winning the beauty peagent with some cancer patients here.
"I think you save the best for the last. I don't think rules set by the society need to be followed by everyone, like getting educated by age of 18 years, marrying at 25 and becoming parent by 27. I don't believe in this," she said.
The actress was linked to Vikram Bhatt and Randeep Hooda.
Sushmita, who became the first Indian woman to win the Miss Universe title in 1994, said she feels honoured to have represented India.
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"I am thankful to India. I feel fortunate to have represented my country 20 years back. Time has flown. I was 18 when I won the crown. I wanted to celebrate the 20 years. I wanted to celebrate life with kids as they teach us how to be brave," Sushmita said.
The Association, working since 1967, provides medical aid to children suffering from cancer.
Sushmita celebrated the day by watching Amole Gupte's recently released film 'Hawaa Hawaai' with children.