US President-elect Donald Trump has awarded key roles in his incoming team to a top Republican party official and a right-wing media chief.
Reince Priebus, chairman of the Republican National Committee (RNC), will be his chief of staff.
In this role, he will set the tone for the new White House and act as a conduit to Congress and the government.
Stephen Bannon, from the Breitbart News Network, will serve as Mr Trump's chief strategist.
Mr Bannon stepped aside as executive chairman of Breitbart - a combative conservative site with an anti-establishment agenda - to act as Mr Trump's campaign chief.
Meanwhile, in the president-elect's first interview, with US broadcaster CBS, Mr Trump said:
- He would deport or jail up to three million illegal migrants with criminal links
- Future Supreme Court nominees would be "pro-life" - meaning they oppose abortion - and defend the constitutional right to bear arms
- He will not seek to overturn the legalisation of same-sex marriage
- He will forgo the president's $400,000 salary, taking $1 a year instead
In a statement released by his campaign, Mr Trump described Mr Priebus and Mr Bannon as "highly qualified leaders who worked well together on our campaign and led us to a historic victory".
Mr Priebus, 44, acted as a bridge between Mr Trump and the Republican party establishment during the campaign. He is close to House Speaker Paul Ryan, a fellow Wisconsinite who could be instrumental in steering the new administration's legislative agenda.
During the election race, Mr Bannon, 62, saw it as his aim to "bolster the business-like approach of Mr Trump's campaign".
Mr Bannon took over at Breitbart in 2012, when he promised to make it the "Huffington Post of the right".
Breitbart is linked to the alternative right movement - or alt-right - which tends to reject both left-wing ideology and mainstream conservatism.
The movement often emphasises free speech and the right to offend. Opponents call it racist, anti-Semitic and sexist.
Who is Stephen Bannon?
- Executive chairman of Breitbart news, although stepped aside for the election campaign
- A graduate of Georgetown University and Harvard Business School, former US Navy officer and investment banker at Goldman Sachs
- Conservative documentary film-maker who produced films celebrating Reagan, Sarah Palin and the Tea Party
- Seen as in conflict with the traditional Republican establishment and has been called a racist and right-wing extremist by some members of his own party
Who is Reince Priebus?
- Mr Trump's campaign adviser, was elected as chairman of the Republican National Committee in 2011
- A lawyer and former Wisconsin state treasurer who worked his way up the Wisconsin Republican party to become its chairman
- Commissioned a party review after the 2012 presidential election defeat to Barack Obama aimed at increasing party appeal
"I want to thank President-elect Trump for the opportunity to work with Reince in driving the agenda of the Trump administration," Mr Bannon said on Sunday.
"We had a very successful partnership on the campaign, one that led to victory. We will have that same partnership in working to help President-elect Trump achieve his agenda."
Democrat Congressman Adam Schiff called Mr Bannon's appointment "unsurprising but alarming". "His alt-right, anti-Semitic & misogynistic views don't belong in WH," he tweeted.
Analysis by Anthony Zurcher, BBC News, Washington
The man who built his campaign railing against The Establishment has chosen the chair of the Republican National Committee to be his chief of staff. It doesn't get much more establishment than Reince Priebus.
If there are clues to be gleaned from Mr Trump's first personnel decisions as president, it's that he's opting for a veteran party hand to manage the White House - although he's keeping an outsider devil on his shoulder in senior adviser Stephen Bannon.
Bringing Mr Priebus and Mr Bannon under the same roof should create some interesting tension. If correctly harnessed, the energy could provide drive to the nascent Trump administration. If things go wrong, it could tear the place apart.
Regardless of how it works out, Mr Priebus's elevation to this powerful position represents the culmination of a winning gamble for the Wisconsinite. While many in his party were urging him to abandon Mr Trump whenever his candidacy appeared on the verge of foundering, he committed - quietly, behind the scenes - to righting the ship.
It often didn't seem possible, but he succeeded - and now he has a White House office to show for it.
Mr Priebus has acted as the party's spokesman and chief fundraiser. He said it was "truly an honour" to join Mr Trump as chief of staff.
"I am very grateful to the president-elect for this opportunity to serve him and this nation as we work to create an economy that works for everyone, secure our borders, repeal and replace Obamacare and destroy radical Islamic terrorism," he said.
Correspondents say one of the big challenges of the new administration will be reconciling Mr Trump with the mainstream Republican party, where sharp divisions emerged during the primaries.
Both houses of Congress are under Republican control.
Donald Trump will take over at the White House on 20 January, when Barack Obama steps down after two terms in office. Mr Trump defeated Hillary Clinton in last week's presidential vote.
On Sunday night, Mr Trump spoke to Chinese President Xi Jinping. The two agreed to meet at "an early date", Chinese state media said.