Sushmita, who is associated with charitbale projects and NGOs, received the award Sunday and took to Twitter to express her feelings.
"Beautiful People!...wanted you to wake up to 'The Mother Teresa International Award', which I received last night...precious, " Sushmita posted on the microblogging site early Monday morning.
The Harmony Foundation also honoured former Outlaw motorcycle club member Sam Childers for his efforts towards rescuing children from a war-zone in Sudan.
"What a privilege to meet with Sam Childers..his life dedicated to saving the lives of children in Sudan from a Militant outfit, " the actress added.
The 37-year-old is known for hits like "Biwi No.1" and "Main Hoon Na".