Bollywood siren Sunny Leone stars in a brand-new advert for People for the Ethical Treatment of Animals (PETA).

She poses with rescued dog Kaali next to the caption "Birth Control! Dogs Need It, Too. Sterilise Your Dogs and Cats".

The ad was shot by leading photographer Gaurav Sawn, and Leone's hair and make-up were done by Ayesha Wadiwala.

In an interview for PETA India, Leone said, "I believe that every single dog should be spayed and neutered. You don't want to continue the cycle of homeless dogs or cats. And spaying and neutering also keeps them healthy.

"It prevents them from having different diseases that they can get if they are not". PETA India's exclusive broadcast-quality interview with Leone is available for download here.

In India, tens of millions of homeless dogs struggle to survive on the streets.

Many of them go hungry, are injured or killed, are hit by vehicles or are abused by cruel people. Countless others are kept in animal shelters because there aren't enough good homes for them.

Every time a dog has a litter, it means fewer homes for the dogs who are languishing in animal shelters or roaming the streets.

The answer is simple: always have your dog sterilised. PETA India's homeless-dog adoption campaign encourages all prospective dog guardians always to adopt from an animal shelter or take in a homeless animal from the streets and never to buy from a breeder or a pet shop – both of which only add to the problem.

Leone, who shares her home in Los Angeles with two rescued dogs, has also signed on to star in the sequel to the horror-thriller film Ragini MMS, one of the most talked about sleeper hits of 2011.

For more information about the animal homelessness crisis you can visit PETA.org.uk.