The Prime Minister has been forced to turn to the DUP for a so-called "confidence and supply" deal after she lost her majority at the general election last week.
Senior Tory sources said that the PM had agreed with Her Majesty that the State Opening of Parliament will now take place on Wednesday June 21.
Sky's David Blevins says sources have confirmed that there is still no agreement yet between the Conservatives and the DUP, despite Mrs Leadsom confirming the Queen's Speech.
The formal beginning of the parliamentary session has been delayed due to May's talks with the Democratic Unionists over an informal deal to secure the Conservatives a majority in parliament.
The state opening, a ceremony full of pomp in which the monarch reads out the Queen's Speech detailing the government's programme for the coming year, was due to take place on June 19.
A "grubby deal" between Conservatives and the DUP is not in the national interest, Nicola Sturgeon has said.
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Scalise has previously played in the congressional game and in previous years wore a variety of Louisiana jerseys. He was out of surgery and in critical condition as of Wednesday afternoon, his family said in a statement .
May's party said earlier on Thursday the Queen's Speech would be held on June 21, signalling the launch of its programme for government.
DUP talks: Theresa May arrives in Downing Street on Wednesday. That business includes Brexit talks between the United Kingdom and the European Union, which will start in Brussels on Monday despite the two-day delay to the Queen's Speech.
"Both parties are committed to strengthening the union, combating terrorism, delivering Brexit and delivering prosperity across the whole country".
Colum Eastwood, the leader of the nationalist SDLP, said the government needed to "prove to the rest of us that they are not under the thumb of the DUP".
Mrs May has yet to reach a deal with the DUP, and the party's leader Arlene Foster has since returned to Northern Ireland.
Republican party Sinn Fein have stressed that they will be seeking reassurances over any deal with the unionists.
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