She says in a tweet: "That he becomes the first British Asian - indeed the first from any minority ethnic background - to become PM is a genuinely significant moment. It certainly makes this a special #Diwali."
On his first political decisions, she says they should include a general election and no return to austerity.
Leader of the Scottish Conservative Party Douglas Ross also hailed Mr Sunak's victory...
Conservative MP calls for inquiry into Braverman appoint.
A Conservative MP has called for a probe into the appointment of Suella Braverman as home secretary.
Ms Braverman left the role on Wednesday last week after sharing government information with a backbench MP using a private email. She was put back on Tuesday this week.
Speaking to the BBC this morning, Caroline Nokes said there are "big questions hanging over this whole issue".
"And to be frank I would like to see them cleared up so that the home secretary can get on with her job," she added.
"If that means a full inquiry then I think that's the right thing to do."
Sunak tells Australia's PM he is 'excited' by relationship between two nations
Rishi Sunak has told Australia's Prime Minister Anthony Albanese that he is "excited" about the relationship shared by the two countries.
During a call today, the new Tory leader told Mr Albanese that free trade agreement, Aukus and the UK's potential accession to comprehensive and progressive agreement for Trans-Pacific Partnership were all examples of the strength of the relationship between the two nations.
A Downing Street spokeswoman said: "The prime minister said he was excited by the relationship between the UK and Australia, which was built on deep friendship and a shared approach to global challenges."
Truss to pocket almost £19k in severance pay as cost of ministers leaving office totals more than £700,000
Britain's year of political turmoil could cost the taxpayer up to £709,000 in severance payments to former ministers and whips, Sky News analysis of House of Commons library data has found.
Since the beginning of the year, 79 government ministers and whips have either been sacked or have resigned.
And 71 of them are likely to be eligible for payments averaging more than £10,000 - no matter how long they were in the job.
Braverman situation needs to be 'sorted asap' - MP with oversight for spies and intelligence
A Conservative MP and member of the Intelligence and Security Committee (ISC) has called for the situation surrounding Suella Braverman being re-appointed home secretary to be "sorted asap".
He warned that MI5 needs to "have confidence" in the home secretary.
Ms Braverman left her role last week after sharing government information through a private email with a backbench MP. She was re-appointed on Tuesday by Rishi Sunak.
Labour renews calls for increased windfall tax after Shell doubles quarterly profits year-on-year
Labour is renewing its calls for an increased windfall tax in the energy sector after Shell's latest profits report.
The energy giant reported operating profits of $9.5bn (£8.19bn) for the third quarter this year - lower than that of the three months before - but still more than double the same period in 2021.
This is a global figure rather than just the number for operations in the UK.
Labour's shadow climate change secretary Ed Miliband said: "As millions of families struggle with their energy bills, the fact that Shell recorded the second-highest quarterly profits in the company's history is further proof that we need a proper windfall tax to make the energy
Braverman 'should be sacked' and a 'full inquiry' launched into her ministerial code breach, says Lammy
Home Secretary Suella Braverman should be sacked and there should be a full inquiry into her ministerial code breach, Labour's shadow foreign secretary David Lammy has said.
Speaking to Sky News in the last few moments, Mr Lammy said the role of home secretary was the "most serious job you could have in our state" and an investigation into her breach was needed.
He said: "This is a person who makes judgements about terrorism and counterterrorism, who makes judgements about very serious offenders, whether they should be allowed out of prison.
"And for that reason, it's someone for whom, I'm afraid, judgement is critically important.