Prince Charles suffered an awkward moment while greeting Spain's Queen Letizia.

Prince Charles

Prince Charles

The Prince of Wales welcomed the brunette royal and her husband King Felipe for afternoon tea at Clarence House alongside his wife Camilla, the Duchess of Cornwall, yesterday (12.07.17), but wasn't sure whether to kiss her once or twice on the cheek.

Charles, 68, was seen awkwardly clutching Letizia's hand in a close embrace in which he looked to be eyeballing her.

Camilla and Felipe were spotted looking on in amusement.

Beforehand, Felipe and Letizia enjoyed lunch at Buckingham Palace and later that evening they attended a state banquet as part of their three-day visit to the UK.

The Spanish royal couple - who married in 2004 - were due to undergo their tour in June but it had to be postponed after British Prime Minister Theresa May announced there would be a General Election.

A notice on the official Royal Family website said at the time: "Her Majesty Queen Elizabeth II and His Majesty King Felipe VI of Spain have agreed that, in light of the General Election, the planned State Visit to the United Kingdom from 6th to 8th June 2017 by King Felipe and Queen Letizia should be postponed.

"The Visit will now take place on 12th to 14th July 2017."