Former Prime Minister Atal Bihari Vajpayee turned 93 on Monday and Prime Minister Narendra Modi was among the first ones to greet him at his residence here.
Vice President M Venkaiah Naidu also wished Vajpayee on his birthday.
"Visited Atal ji to convey birthday greetings to him. Spent time with his family as well," the prime minister wrote on Twitter.
Birthday greetings to our beloved Atal Ji. His phenomenal as well as visionary leadership made India more developed and further raised our prestige at the world stage. I pray for his good health.
Earlier in the day, Modi credited Vajpayee's phenomenal and visionary leadership which "further raised our prestige at the world stage. I pray for his good health".
Naidu posted a poem in Hindi on Twitter by the former prime minister which urged people to remain united and not to give up hope in tough times.
Jammu and Kashmir Chief Minister Mehbooba Mufti also wished the BJP veteran on his birthday.
"Warm birthday wishes to Atal Bihari Vajpayee Ji. A visionary leader who called for peace, progress & prosperity in J&K by imbibing the spirit of Insaniyat, Jamhuriyat & Kashmiriyat," Mehbooba said on Twitter.