Abhishek Bachchan sent his prayers and thoughts to the neighbouring country.
"Stay strong #SriLanka!" the actor wrote on the microblogging site.
R Madhavan tweeted, "So very heart breaking and tragic. Heartfelt sympathies to all families of the victims. God give them courage to handle this cowardice."
Arjun Kapoor said he was "disturbed to hear about the monstrous attack in Sri Lanka on such an auspicious day".
Parineeti Chopra tweeted, "Could never have thought a quiet country like #Srilanka could be attacked like this. What is the world coming to? Thinking of all the families affected. All my love and prayers always."
"Our hearts go out to everyone affected by this tragic act of violence in Sri Lanka. We are praying with you in this painful moment of sorrow, grief and shock," Anushka Sharma tweeted.
Dia Mirza wrote, "My heart goes out to #Srilanka. Thoughts and prayers for all the families who have lost their loved one's..."
Actor-turned-politician Urmila Matondkar also took to Twitter to condemn the attacks.
"Deeply saddened and shocked to hear about the church bomb blasts in Sri Lanka on Easter Sunday... My prayers for those who lost their lives and condolences to their families... We condemn the terror attack," Matondkar, who recently joined the Congress party, said.
Actor-politician Prakash Raj said in the light of the attacks, it is important to "beware of and condemn all bigots who are sowing hatred".
"Blasts in Sri Lanka as people are praying... This hate... These ugly acts of majoritarianism will consume us. Humanity one day... dear citizens this is why we need to be aware and be careful and condemn all the bigots who are sowing hatred. And dividing us in our society today," Raj tweeted.
"My heartfelt condolences and prayers are with the families affected in #Srilanka. Here's praying and hoping for a terror free world!" Sidharth Malhotra tweeted.
Vicky Kaushal wrote, "Prayers for Sri Lanka."
Swara Bhasker called the news of serial blasts "heartbreaking and tragic".
"Curses upon the monsters who carried out this inhumanity! On a joyous festive day! What is the world coming to? Prayers and strength to the victims and families," she tweeted.
Boman Irani said he was shocked to hear the extremely disturbing news and recalled staying at one of the hotels struck by the blasts.
"Had stayed at the hotels and it's heartbreaking to even imagine the situation.
My heartfelt condolences to the near and dear ones of those who lost their lives & praying for a speedy recovery of the ones injured," Irani tweeted.
South actor Siddharth said he is devastated by the news of blasts in Sri Lanka.
"Places of worship and hotels have been targeted. To all those affected, you are in our prayers," he said.
TV actor-host Karan Tacker wrote, "This has just left me silent. Really sorry for the families of the people affected by this. #SriLanka".