Trierweiler, who is an active member of Action Contre La Faim - an international humanitarian organization committed to saving the lives of malnourished children - flew to India from Paris over the weekend.
She spoke about Fight Hunger Foundation, an NGO which promotes approaches to prevent acute malnutrition, over a private lunch where Kareena was also present.
"I am extremely glad and fortunate to be a part of this private lunch affair. All the women in this room are not just beautiful but powerful and successful as well," Kareena said in a statement.
The event was organised by lifestyle expert Chhaya Momaya.
"Kareena epitomises the power of women today with her grace and beauty. With her honest commitment towards the cause she has taken up she can influence and empower the audience effortlessly," Chhaya Momaya said.