In the picture, Ms Irani is bent over and touching her toes. In the caption accompanying the picture, she asks, "Who said fat can't be flexible" followed by a host of emojis.
Posted nearly five hours before writing this, the picture has received over 4,600 'likes' and a flurry of overwhelmingly positive comments in response.
"Tell me about it," quips television actor Delnaaz Irani.
"Slaying it. Awesome," comments an Instagram user on the picture. "Not bad at all," writes another.
"But who says you are fat," asks a third. "You are healthy fit and flexible..."
Ms Irani also posted more pictures of Yoga Day celebrations on Twitter, writing after yoga in the rain, it was "time for some chai pakodas."
After yoga in the rains, time for some chai pakodas pic.twitter.com/8MmKtzwz5I- Smriti Z Irani (@smritiirani) June 21, 2017
In 2015, Prime Minister Narendra Modi persuaded the United Nations to declare June 21 International Yoga Day. Early this morning, PM Modi led the World Yoga Day celebrations at Lucknow's Ambedkar Sabha Sthal. The event was attended by around 50,000 people, including Uttar Pradesh Chief Minister Yogi Adityanath and key members of his cabinet.
In Ahmedabad, yoga teacher Ramdev and BJP chief Amit Shah led the Yoga Day celebrations. About 5 lakh people turned up to do yoga at 5.30 in the morning. The event set a world record.
Similar events are being held in 180 nations across the world today.
Click for more trending news