"This is for the first time that 8,000 guests will be attending the swearing-in ceremony that will be held from 7 pm to 8.30 pm on Thursday," Mailk said.
About 4,500-5,000 guests have attended such ceremonies earlier.
There will be light snacks for the guests attending the swearing-in ceremony like 'Paneer Tikka', the official said.
"There will be a dinner which will be hosted by the president for about 40 guests. It will begin at 9 pm," Malik said.
One of the key dishes 'Dal Raisina' will be served in the dinner, he told PTI.
"Dal Raisina, a speciality of Rashtrapati Bhavan's kitchen, is cooked for about 48 hours. Its main ingredients are brought from Lucknow.
"The preparation of Dal Raisina started Tuesday," the spokesperson said.
Leaders of all BIMSTEC countries have confirmed their participation in the prime minister's swearing-in ceremony.
Mauritius Prime Minister Pravind Kumar Jugnauth and Kyrgyz President Sooronbay Jeenbekov have confirmed their participation at the event.
President of Bangladesh Abdul Hamid, Sri Lankan President Maithripala Sirisena, and Prime Minister of Nepal K P Sharma Oli have confirmed their participation at the ceremony.
President of Myanmar U Win Myint and Bhutanese Prime Minister Lotay Tshering have also confirmed their attendance at the event.
From Thailand, its Special Envoy Grisada Boonrach will represent the country at the ceremony.