President Ram Nath Kovind, Prime Minister Narendra Modi paid their tributes to Swaraj at her residence in Delhi.
Clad in white kurta-pyjama, PM Modi bore a sombre look on his face, paid his tribute to the 'Iron Lady' and went on to express his condolences to the Swaraj family.
He held on to Sushma's husband Swaraj Kaushal's hand and listened to him patiently.
Union Home Minister Amit Shah also arrived at her residence to pay last respects. Former deputy PM LK Advani, Rahul Gandhi, UPA chairperson Sonia Gandhi, former PM Manmohan Singh, Vice President M Venkaiah Naidu, Bahujan Samaj Party (BSP) Chief Mayawati, were also present.
Kerala's former Chief Minister Oommen Chandy, Trinamool Congress MP Derek O'Brien, Nobel Laureate Kailash Satyarthi were among those who arrived at her residence. Bharatiya Janata Party leader Hema Malini, Yog guru Ramdev, Delhi Lt Governor Anil Baijal were also in attendance.
Swaraj's mortal remains will be taken to the BJP headquarters later in the day from her residence. Her rites will take place after 3 pm, she will be cremated with full state honours.
Delhi: Lok Sabha Speaker Om Birla pays last respect to former External Affairs Minister & BJP leader #SushmaSwaraj, at her residence. She passed away last night due to cardiac arrest. pic.twitter.com/DTRJEBM4mC
"There will be no cultural events during this period in the state," a statement from issued by Delhi government read.
Sushma Swaraj was one of the most prominent faces of the BJP who immensely contributed to the party's growth and never shied away from taking challenges.
Sushma Swaraj: BJP's most prominent woman face passes away at 67
Her rise in politics coincided in some ways with the growth of BJP as a party. She left a mark in roles as a union minister in the Atal Bihari Vajpayee government, as leader of opposition in the Lok Sabha from 2009 to 2014, and as External Affairs Minister in the first term of Narendra Modi government.
A four-time member of Lok Sabha and three-time of Rajya Sabha, she did not contest in 2019 Lok Sabha elections citing her bad health.
The 67-year-old accepted tough challenges which helped the BJP break new grounds.
Swaraj was rushed to AIIMS, Delhi after suffering a cardiac arrest on Tuesday evening. She breathed her last after doctors failed to revive her after trying for over an hour.
Meanwhile, the Delhi government has announced a two-day state mourning on the sudden demise of Sushma Swaraj.