President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE and first lady Melania Trump Melania TrumpTrump privately blamed Black Americans for lacking initiative: report The Hill's 12:30 Report: Ginsburg lies in repose Melania Trump: Ginsburg's 'spirit will live on in all she has inspired' MORE were greeted at Buckingham Palace on Monday by Queen Elizabeth II, kicking off the president’s three-day state visit to the United Kingdom.

The queen shook hands with both Trumps against the backdrop of a gun salute before the trio walked into the palace in London, where the first couple is expected to have a private lunch with the queen.

JUST IN: Queen Elizabeth II welcomes Pres. Trump and first lady Melania Trump to Buckingham Palace at start of three-day state visit to the U.K. https://t.co/P5Bwltc9hm pic.twitter.com/HMnh3hWKX2 — This Week (@ThisWeekABC) June 3, 2019

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Before greeting the queen, President Trump inspected a group of Grenadier Guards wearing their traditional red tunics and bearskin hats in the palace garden, part of the pomp surrounding a state visit.

The queen presented the Trumps with gifts, giving the president a first-edition abridged version of Sir Winston Churchill's "The Second World War," and giving the first lady a “specially commissioned silver box" designed to evoke the ceiling of Buckingham Palace's music room.

Trump is expected to have tea with Prince Charles and Duchess Camilla later Monday.

Trump’s meeting with the royals should largely avoid the hot-button issues that will dominate the later part of the president’s visit, such as his meeting with Prime Minister Theresa May Theresa Mary MayAre US-Japan relations on the rocks? Trump insulted UK's May, called Germany's Merkel 'stupid' in calls: report Bolton says Boris Johnson is 'playing Trump like a fiddle' MORE days before she leaves office.

The president publicly criticized May’s Brexit strategy, stopped just short of endorsing Conservative Party politician Boris Johnson as her successor, called comments Duchess Meghan Markle Meghan MarkleTrump wishes Prince Harry 'luck' with Meghan Markle after Biden endorsement: 'Not a fan' Meghan Markle and Prince Harry call on voters to 'reject hate speech' and 'misinformation' Does Kamala Harris's music matter? MORE made about him “nasty” and blasted London Mayor Sadiq Khan as a “stone cold loser.”

Even before those controversial comments, Trump’s state visit stirred widespread angst in the U.K. capital. He is expected to face thousands of demonstrators during his visit to London.

--Updated 10:05 a.m.