"He has to see the British head of state", adding that other details of the trip had not been finalised.
"Putting his foot on the ground of British soil is Job One - very, very important, very symbolic".
'A range of issues about our shared interests and I think it is important that when we see the President of the United States here in the United Kingdom we are able to have those discussions'.
But while Mr Trump may be looking forward to meeting the Queen, his visit to the United Kingdom from July 13 is set to be less than cordial, with protests against the President's domestic and worldwide policies already planned.
Johnson told Sky News in London that the president "has to" meet with the monarch next month.
"The pictures of children being held in what appeared to be cages are deeply disturbing", May responded.
Theresa May has condemned the US Government's policy of separating children from their parents if they are captured after crossing the border from Mexico, saying it was "completely and unequivocally wrong".
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However, the US Congress would need to pass a law authorising it before any new branch of the military could be created. She warned that if realized, such plans would have a "destabilizing effect on strategic stability and global security".
Trump will touchdown in Britain on July 13 for a business trip.
A spokeswoman for the Royal Collection Press Office said there has not yet been a formal announcement about a meeting between Trump and the queen and so declined to comment further.
London Mayor Sadiq Khan this week defended the right of residents to protest about the President's visit while speaking to singer Jessie Ware on a podcast.
The immigration policy was previously described by Tory MP Sam Gyimah as "indefensible".
The president's visit has most recently been described as a "working visit" after being downgraded from a state visit by Prime Minister Theresa May a year ago.
Footage and photographs released by the department depict people, including children, housed in large metal chain-link cages within the administration's makeshift shelters.
Mr Trump's tough new immigration policy has seen more than 2,000 children separated from the parents and placed in holding centres as the adults are prosecuted for entering the U.S. illegally.