Stepping off a plane to be greeted by a welcoming committee with the eyes of the world on you would be a test enough for the most confident among us.

So it was no wonder that Prince George, who turns four on Saturday, seemed to be feeling a little overwhelmed as he arrived in Warsaw with his parents this morning for the start of their five-day visit to Poland and Germany.

Shy George needed a little encouragement from his father as they prepared to disembark the plane. Photo / Getty Images
Shy George needed a little encouragement from his father as they prepared to disembark the plane. Photo / Getty Images

The little Prince kept close to his father Prince William who seemed to have to coax his shy little boy off the plane and down the steps after their private plane landed at Warsaw Chopin Airport in the middle of a light rain shower, the Daily Mail reports.

George was determined to keep a firm hold of his dad's hand, with William leaning down to offer a few words of encouragement as they were greeted by Jonathan Knott, Britain's ambassador to Poland, his wife Angela, and the diplomat's Polish counterpart in Britain Arkady Rzegocki.

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George fidgeted, swinging his right leg backwards and forwards before wrapping it around his left as William smiled and shook hands, while Princess Charlotte was feeling anything but camera shy as she smiled in her mother's arms and waved to onlookers.

Prince William encourages George off the plane. Photo / Getty Images
Prince William encourages George off the plane. Photo / Getty Images

The two-year-old looked adorable in a floral dress teamed with red shoes and white socks, while George was in his trademark navy shorts, teamed with a checked shirt.

The Duchess of Cambridge kept it simple in a white peplum coat by her go-to designer Alexander McQueen, teamed with a favourite pair of pale pink suede court shoes.

William and Kate's trip, taken at the request of the Foreign and Commonwealth Office, is likely to be seen as another Brexit diplomacy tour, helping to maintain and strengthen the UK's relations with Europe as it leaves the EU.

But all eyes will be on the couple's children, George aged three and two-year-old Charlotte, who are getting used to travelling overseas having joined their parents in Canada last year for an official trip.

Prince William was seen leaning down to say a few words to his son, who looked a little overwhelmed. Photo / Getty Images
Prince William was seen leaning down to say a few words to his son, who looked a little overwhelmed. Photo / Getty Images

They were last seen in public on Buckingham Palace's balcony watching the flypast following the Trooping the Colour ceremony.

They are likely to be seen on only a few occasions during the tour of Poland and Germany, making appearances during arrivals and departures at the two countries, and possibly at one or two of the engagements.

But the youngsters will certainly be kept entertained as Warsaw's Belvedere Palace, where they are residing during the visit, has had playground toys installed.

Prince George and Princess Charlotte arrive at Warsaw airport. Photo / Getty Images
Prince George and Princess Charlotte arrive at Warsaw airport. Photo / Getty Images

With George starting school in south London this September, attending the mixed-sex Thomas's Battersea school, and his sister likely to be enrolled in a nursery, this is the last time the royal couple will be able to take their children with them without school commitments making it problematic.

Royal watchers will also get a glimpse of Kate's new haircut dubbed the 'Kob', Kate bob, which she debuted during a visit to Wimbledon last week.

Kate appears to have lost quite a few inches from her tresses and it has a vibrant deep brown colour.

After receiving an official welcome, the foursome walked along a red carpet into a small terminal past the large group of media and on to a meeting with Poland's President Andrzej Duda.

While George may have been feeling a little shy, his younger sister is already a natural on official engagements. Photo / Getty Images
While George may have been feeling a little shy, his younger sister is already a natural on official engagements. Photo / Getty Images

William and Kate's five-day trip will began with a welcome from President Andrzej Duda in the Polish capital, and lunch at the Presidential Palace with the First Lady Agata Kornhauser-Duda.

The royals were greeted by crowds of schoolchildren waving British and Polish flags outside the president's residence.

Next stop is a visit to the Warsaw Rising Museum, dedicated to the 1944 Polish uprising to liberate Warsaw from German occupation during the Second World War.

Prince George of Cambridge as he arrives with Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Princess Charlotte. Photo / Getty Images
Prince George of Cambridge as he arrives with Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Princess Charlotte. Photo / Getty Images

Today will end with a Queen's birthday garden party, during which William will give a short speech.

During their five-day tour William and Kate will also meet survivors of the Holocaust and Nazi oppression as they acknowledge the complex 20th century histories of each country.

In Poland, they will tour the former Stutthof concentration camp where 65,000 people died at the hands of their captors, and also visit Berlin's Holocaust museum and memorial.

They will also tour the site of Gdansk's shipyards, the birthplace of Poland's Solidarity movement that helped topple Communist rule.

The visit to Poland offers the family a final chance to travel together on official business before George starts school. Photo / Getty Images
The visit to Poland offers the family a final chance to travel together on official business before George starts school. Photo / Getty Images

Here they will meet with founding members of the organisation but it is not known if Lech Walesa, Poland's former president and leader of its peaceful pro-democracy struggle, will be present.

Chancellor Angela Merkel will hold a private meeting with the royal couple in Berlin at the start of the German leg of their tour on Wednesday, and afterwards William and Kate will visit the Brandenburg Gate, a symbol of German unification.

The Duchess of Cambridge and Princess Charlotte arrive at Warsaw airport. Photo / Getty Images
The Duchess of Cambridge and Princess Charlotte arrive at Warsaw airport. Photo / Getty Images

The mood will change when the duke and duchess renew their friendly sporting rivalry, that seems to play a part in most of their trips, when they visit the picturesque Germany city of Heidelberg, twinned with Cambridge.

William and Kate will take to the waters of the River Neckar to cox opposing rowing teams in a race with crews from drawn from Cambridge and Heidelberg.