"I have sung a lori (lullaby) in the film, which comes in the important part of the film. It's a very intimate conversation between the mother and child and yes, it was fun. It has a good tune," said Priyanka.

She was speaking at the trailer launch of "Mary Kom" on Wednesday.

Director Omung Kumar got ample support from Mary Kom during the making of the movie, which will release September 5.

In the last few years, Bollywood has successfully churned out films based on sportsmen like "Paan Singh Tomar" and "Bhaag Milkha Bhaag".

Many feel that sports based films have become trendy in filmdom, but Priyanka begs to differ.

She said, "This is the first film on a female athlete and it is very disrespectful to say it's a trend."

Mary Kom Trailer Out

Priyanka Chopra poses for a photograph during a promotional event for 'Mary Kom' directed by Omung Kumar and produced by Sanjay Leela Bhansali in Mumbai

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