Hailing from Kerala, Kumar, better known by his stage name Unda Pakru, has made it into the Guinness Book of World Records after starring in 50 films over 13 years.
"There's no point complaining about being a dwarf. I am small in size but I have got the talent and can work like a normal man," The Telegraph quoted Ajay as saying.
The tiny actor has not only earned fame and a small fortune through his acting, but is even considered as an eligible bachelor by families seeking a good husband for their daughters.
In 2005, when he married Gayatri, 5ft 1in-who is more than twice her husband's height-the ceremony was broadcasted on local television across India's southwestern states.
Ajay said: "We had a traditional arranged marriage. My mother was looking for a match for me when our neighbour said she had a relative with an educated and beautiful daughter.
"My mother arranged the meeting and I liked her, so we got engaged. My five-month-old daughter is a normal size like her mother, so I am very happy."
"There are hundreds of dwarfs like me but they don't all succeed. It's about mind, not just the body."