Bollywood celebrities paid heartfelt tributes to the former president, who suddenly passed away on Monday evening in Shillong.
Several names from the Hindi film industry took to Twitter to remember their moments with Kalam, and to bid their 'aakhri salaam'.
Here's what they tweeted:
Amitabh Bachchan: A brilliant mind, a child like demeanour, simple caring and loved by all .. ex POI passes away .. PRAYERS.
Shah Rukh Khan: So sad to hear about the Gurdaspur terror attack & now the news of Dr. Kalam's demise. May Allah bring peace upon all.
Salman Khan: Never had the opportunity to meet Kalam saab but always loved and respected him. As scientist and as president, Kalam saab was a true inspiration for many generations of Indians. When your heart says you should meet someone, don't delay. I always wanted to meet Kalam saab and I should have made the effort. My loss. I will miss Kalam saab. India will miss him.
Priyanka Chopra: "They say Good & Great are seldom in the same man. Dr Kalam was the epitome of both. A big loss for India. May his beautiful soul Rest in Peace."
A.R. Rahman: Dr. Kalam, when you became the president, you gave the word 'hope' a new meaning for Indians... Today, we have lost a great leader who inspired our young minds to feel that we live in the greatest nation on the Earth and that each one of them can achieve great things... May the creator lead you to heaven.
Anupam Kher: Thank you Dr. Kalam for your wisdom, for your inspirational life, for your generosity, for your patriotism & for your teachings. #MyHero
Kabir Bedi: Saluting the memory of APJ Abdul Kalam, India's most loved President, a truly inspirational Bharat Ratna. RIP @APJAbdulKalam.
Abhishek Bachchan: RIP Dr. Kalam. Huge loss to us all.
Divya Dutta: Not one person Awho's not tweeting abt dr kalam! A truly loved n admired person!! By all! Unanimously!!! Rare n special! RIP sir!
Farhan Akhtar: Deeply saddened to hear about the demise of one of the most inspirational Indians of our time, former President Dr. APJ Abdul Kalam. RIP.
Anushka Sharma: Very sad to hear about the passing of APJ Abdul Kalam. Loss of an inspiring visionary and a wonderful soul. May his soul RIP.
Adnan Sami: Dr. APJ Abdul Kalam loved every element of life. Amongst many things, he preached "Unity of Minds through Music". RIP.
Sushmita Sen: What a glorious life!!Greatness lead by example!!#Respect#Salute d life n divine grace of Mr. Avul Pakir Jainulabdeen Abdul Kalam #Godspeed
Manoj Bajpayee: His contribution in putting India on top has been immense incomparable. We bow down to true son of this nation. RIP Kalam sahib!