Harry, accompanied by Meghan and a dozen of his support team, last night made a secret visit to a popular restaurant in the old town of Dusseldorf.
The Duke, who is 39 today, sank six glasses of the Alt Schumacher beer as he celebrated not only his birthday but the success so far of the Invictus Games.
His party dined on local delicacies such as Wiener Schnitzel, sausage and pork knuckle.
Harry was also presented with white chocolate which he took back to his hotel and shared with his team. Meghan had only sipped a single beer during the evening.
For her latest appearance today, Meghan wore a Zara jumpsuit Celine Blazer and Saint Laurent Sandals and had a purse from the Cesta range made in Rwanda .
The couple watched a sitting volleyball match between hosts Germany and Poland.
The Polish team mobbed Harry after the game and sang happy birthday again.
With Meghan he posed for numerous selfies before leaving where they were greeted with screams of ‘We love you, Meghan’ from a group of excited teenagers.
The group had rushed down from the stands to try to get close to the Duchess as she left.
Lina Dettling, 15, said: ‘We love Meghan. She is so pretty and we just wanted to see her.’
Kerlos Yosif, 15, added: ‘We are excited to see Harry and Meghan. To us they are like popstars . They do so much good.’
The teenagers were among hundreds of students given the day off from school to attend the games.
Later, Harry and Meghan hitched a ride on a golf buggy to take them to the road cycling event.
Last night, Harry partied with Meghan in a traditional German bar in Dusseldorf with friends where he washed down bratwurst sausage and wiener schnitzel with six beers.
Bar staff said the royals were ‘lovely’ and left a ‘big tip’ as they enjoyed plates piled high with red cabbage and mashed potato. While Harry celebrated with six half-pints, his wife stuck to just one small drink.
Diners at the Im Goldenen Kessel restaurant and bar were asked not to take pictures but said they saw the prince laughing and joking as the food arrived at his table. He also looked thrilled when a birthday cake arrived at the end of the meal.
He and Meghan posed for photographs with the owner of the restaurant Thea Ungermann and head waiter Frank Wackers who has worked at the restaurant for 38 years.
Ms Ungermann told MailOnline: ‘Harry was a lovely man and was having a very jolly time. Meghan was lovely.’
Meghan stuck with the white skinny jeans she wore to watch the volleyball match yesterday. She paired it with a red and white pinstriped shirt and nude ballet pumps. Meanwhile Harry wore dark jeans and a grey top.
During his meal, Harry was presented with a birthday cake by staff at the restaurant, based in Dusseldorf’s old town.
He and his party took up two tables at the restaurant, which is part of the Schumacher brewery, and were served their food and beer by Mr Wackers.
Mr Wackers told MailOnline that Harry had six small beers – about half a pint rather than the litre-sized beers most German breweries serve.
He said the group were served Wiener Schnitzel, pork knuckle, sausage and plates of roast and mashed potato.
Mr Wackers said: ‘They were very happy. He is a lovely man, and they were so nice.’
He also joked that Harry’s bodyguard asked what was the beer like. ‘He said that he would kill me if the beer was bad, but I know he was joking.’
Aides and staff sang Happy Birthday as the restaurant presented Harry with a white chocolate cake.
After tucking in, the party then walked back to their waiting cars in the cobbled Altstadt area of the city.
A source close to the prince said: ‘They drank local beer and ate family style dishes to experience a true German meal. Everyone was incredibly friendly, especially the waiters pictured in the photograph online.
‘They did not dine in a private space and were in joyful spirits, toasting and laughing with the team.
After dinner, the group headed back to the hotel to sing Happy Birthday and eat cake just shy of midnight.’
The owner of the restaurant said Harry picked up the bill and left a big tip for the staff.
The restaurant is attached to the Schumacher brewery, one of two popular venues in Dusseldorf.
Both Ms Ungermann and the head waiter speak fluent English so were able to take Harry and Meghan’s orders without needing to translate them into German.
Harry and his party had driven from their hotel in the Media Harbour of the city and were dropped off by a pedestrian area.
They walked the 50 yards to the restaurant past other bars before occupying two tables in a raised section of the restaurant which is next door to a McDonalds.
The party drank the locally brewed beer called Alt Schumacher which is also served at the Merkur Spiel-Arena where the Invictus Games are held.
Ms Ungermann said: ‘The couple were very relaxed, they drank our beer, Schumacher Alt – it’s the same beer they are serving at the Invictus Games.
‘Harry and Meghan sat next to each other during the meal. I had goosebumps when they walked into the restaurant, I had watched his speech on the stage at the Invictus Games and couldn’t believe he was in my restaurant. Prince Harry was so lovely and gave me a hug.’
The restaurant posted the group photo of Harry and Meghan with staff on their social media.
Harry is thought to have had an early 39th party because he will be busy with events at the games today.