A few stars, including Juhi, Shilpa and Amrita Rao, even took part in various yoga sessions and urged their fans to follow them.
Here's what some of the celebrities tweeted:
Hema Malini: International Yoga Day today! I hope everyone is doing at least some asanas as our PM has requested! Spread the culture - we need it badly!
Kirron Kher: It's a historic first! Happy #YogaDay to everyone. Practicing #Yoga has intense benefits for the body, mind and the soul.
Juhi Chawla: Let us Celebrate #Yogaday by doing "Namaskar" - the simplest form of #YogaForAll from @SadhguruJV : https://www.youtube.com/watch?v=KX_pnMG-4RE...
Boman Irani: Seen yoga being practised all over the world. It's time we practice what is ours, by us. #YogaDay I'm up and about early on #YogaDay Well that's a start!
Shilpa Shetty: Enjoyed a great Yoga session under the sky with 10000 people joining me in doing the asanas. What a historic day. Happy international yoga day
Anupam Kher: Only a person like my Grandfather (Yoga Guru) could give me the ultimate advice, "Bheegha hua aadmi baarish se nahi darta.":) #HappyYogaDay
Sidharth Malhotra: #InternatioanalDayofYoga Yoga should be a integral part of our daily life, 2reach our true potential.Thank u @suveerbalvi for ur guidance.
Paresh Rawal: Glimpse of #YogaDay preparation...from all over the world..Not for Deshi Thag & #AdarshLiberal ..will hurt them
Nimrat Kaur: Hope #InternationalDayofYoga more than anything else, serves as a fresh start to all who haven't been initiated into this world of wonder !
Shekhar Kapur: Yoga means union. Between you and your spiritual self. Between you and your universal self. #InternationalDayofYoga
Vir Das: Today is Yoga Day and Father's Day. Makes sense. The reason you were born is because your dad did a few minutes of 'yoga'.
Amrita Rao: Awaken the Yogi within...Happy International YOGA Day! @ankita01sood
Sarah-Jane Dias: If you must take a stand, let it be on your head!!! HAPPY YOGA DAY to all! #worldyogaday #YogaDay #Yoga
Atul Kasbekar: #India actually just took international ownership of #Yoga About Time and Well done I say. Take a bow @narendramodi