Prime Minister Narendra Modi will attend the ceremony to be held at Wankhede stadium in south Mumbai, they said.
BJP's legislature party leader will be elected on Tuesday at a meeting here.
The new leader is expected to meet Governor C Vidyasagar Rao and stake claim to form the government. There is no clarity yet on when the meeting with Governor would take place.
BJP's central observer Rajnath Singh will be present at the legislators' meeting along with party leaders J P Nadda, Om Prakash Mathur and Rajiv Pratap Rudy.

Sena backs BJP for CM's post, favours coalition
As BJP prepared to elect the leader of its legislature party on Tuesday who will be the party's first Chief Minister of Maharashtra, Shiv Sena appeared resigned to backing it in government formation but there was no clarity yet on whether it will join the ministry.
Speaking openly in favour of a BJP-led coalition government for the first time, senior Sena leader and spokesman Sanjay Raut said it will be a "stable" dispensation.
"If Shiv Sena and BJP come together to form a government it will be stable. Our ties with BJP are very old. Whatever happened during the election we have have forgotten. Ours is not like an India-Pakistan fight.
"The people have given mandate to BJP. It has got more seats. It is our duty (to lend support to BJP). Sena's support will always be there for a Chief Minister who works in the interest of Maharashtra," he said.
The newly elected BJP MLAs will meet at 11 am in the presence of Union Home Minister Rajnath Singh and party's general secretary in-charge of the state J P Nadda to elect their leader.
"After the legislature party leader is elected, we will call on Governor C Vidyasagar Rao and stake claim to form government tomorrow itself," BJP general secretary Rajiv Pratap Rudy said.
State BJP president Devendra Fadnavis, 44, is being seen as clear favourite for Chief Minister's post.

Sharad Pawar's NCP, with 41 MLAs, has already offered unconditional outside support to BJP, which has 121 MLAs and pre-poll ally Rashtriya Samaj Paksha one in the 288-member Assembly, in its bid to form government.
Making things easier for BJP further, the party made it clear that it will bail out the new government during the trust vote if Shiv Sena does not join it.

NCP to abstain if BJP seeks trust vote: Malik
The NCP in Maharashtra will abstain from voting in Legislative Assembly if a minority government headed by the BJP seeks trust vote.
"If Shiv Sena joins the government, there will be no problem. We will not be part of the government but do not want to create instability by voting against a minority government. So NCP will abstain if there is voting," NCP spokesman Nawab Malik said.
NCP would like to honour the people's mandate which is in favour of BJP ,the single largest party, he said.
Seven independents and five MLAs from smaller parties will support the BJP government during the floor test taking the total strength to 134, ten short of the simple majority mark in the house of 288. There is one nominated member taking the total strength of the legislative assembly to 289.
In an interview to an English daily, NCP chief Sharad Pawar said, "if situation warrants and there is voting in the assembly (for establishing majority) we will abstain."
" Numbers are such that we are compelled to do it, otherwise there will be no government in Maharashtra and within six months there will again be elections," he said in the interview.

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