Cressida Bonas is to co-host a royal engagement with Prince Harry.
The 25-year-old blonde has officially been recognised as the prince's girlfriend as she has been invited to host the royal dinner - in honour of the war veterans who completed a South Pole trek with Harry last year - at St James's Palace this week.
A source told the Daily Express newspaper: "Harry and his mates went through thick and thin together, so the dinner party will be a really relaxed and jovial affair.
"But there is no doubt that it will be a royal banquet, albeit a private one."
The dinner will see Harry reunite with his fellow trekkers, with whom he walked to the South Pole in treacherous weather conditions in December.
The 29-year-old royal took part in the trek for the Walking with the Wounded charity - which he is a patron of - and was joined by numerous war veterans who returned from duty with life-changing injuries, such as lost limbs.
Harry and Cressida were recently seen being affectionate with one another at the We Day charity event in London.
The couple - who have been dating for two years - were also spotted enjoying a rugby game at Twickenham Stadium.

Sir Tom Jones has been told to liven up on 'The Voice'.
Producers were left exasperated on Saturday (22.03.14), which marked the first live show of the series, as they deemed the music legend too dull as he gave feedback to the budding singers who performed live for the first time.
An audience source told The Sun newspaper: "While the other coaches were giving it everything they had, Tom seemed to be reverting to stock answers.
"He called everyone 'great' and his responses were flat and awkward -- plus he gave Emma Willis a hard task quizzing him."
It's thought producers were forced to tell Tom to be more animated while they aired pre-recorded footage and at one point, they waved their arms "frantically" as he spoke to try and get him to be more enthusiastic.
However, it seems their efforts were futile.
The source added: "Unfortunately for them, it wasn't having much of an effect."
Meanwhile, BBC insiders insisted Tom, 73, was being briefed in order to ensure the show didn't run over its time slot.
Four singers were axed in Saturday's live quarter final, including Iesher Haughton from will.i.am's team, Georgia Harrup from Tom's team, Ricky Wilson's act Emily Adams, and Kylie Minogue's artist Rachael O'Connor.

Kim Kardashian and Kanye West reportedly rejected a charity donation to settle their lawsuit over leaked engagement footage.
The 'Keeping Up with the Kardashians' star and her rapper fiance - who have nine-month-old daughter North together - are suing Chad Hurley for putting unauthorised footage of the 'Bound 2' star's lavish proposal online and the YouTube co-founder is said to have had an offer to settle the case out of court rejected as the couple want any money to go directly to them.
A source told RadarOnline.com: "Chad wanted to make a donation to a charity just to make it go away.
"But Kim and Kanye didn't want the money to go to a charity, they want it to go directly to them."
Earlier this month, the couple filed a motion to quash Hurley's attempt to have the case dismissed on constitutional grounds - claiming it violated his rights to free speech - stating they "generally object to the entirety" of the tech entrepreneur's argument, and though the judge ruled in their favour, insiders say the MixBit founder still doesn't believe he has done anything wrong.
The source added: "Chad really doesn't think he did anything wrong."
Hurley - who posted a blurry 150-second video of the extravagant proposal at San Francisco's AT&T Park stadium on MixBit - had also argued he wasn't informed he wasn't allowed to film or distribute the footage, but when ruling the case could go ahead, the judge noted that the word 'CONFIDENTIALITY' could be seen clearly on a document he signed when entering the stadium.
The couple are seeking unspecified damages against Hurley and his company Avos Systems Inc.

Liam Payne has mocked jibes about his weight.
The One Direction hunk claimed he was planning to gorge on calorific fast food before checking into "fat camp" following online barbs that he is "getting fat".
He tweeted: "Lol just seen on twitter people think I'm fat?now I've never been called that before nice, on my way to mcdonalds then I'm off to fat camp (sic)"
And referring to 'Wrecking Ball' singer Miley Cyrus' famous butt-shaking 'twerking' dance moves, he then added: "Lol just seen on twitter people think I'm fat?now I've never been called that before nice, on my way to mcdonalds then I'm off to fat camp (sic)"
Earlier this year, Liam, 20, threatened to quit twitter because he was tired of being constantly scrutinised.
He tweeted: "Sick of all this bull il be back again when the freedom of speech law is back and people don't believe to much into the bulls#!t they read (sic)''
The 'Little Things' hitmaker lashed out after receiving a barrage of criticism for revealing he is a fan of controversial TV show 'Duck Dynasty', which had been under fire after programme patriarch patriarch Phil Robertson was revealed to have used homophobic slurs.
Liam tweeted: ''Oh my god can someone literally not be a fan if a show without bring labeled WTf I bought dinner the other day it made a news story
''What I gotta do to please you b******ds I'm a 20 year old just living life as you did when u where twenty but in extraordinary circumstances
''I can't do anything without being judged u try that and write about it (sic)''

Eva Longoria has hit out at Khloe Kardashian for refusing to speak about her life.
The 39-year-old actress can't understand why the 29-year-old reality star was reluctant to discuss anything personal during a live interview last week, when she airs her every aspect of her life on her show 'Keeping Up With the Kardashians'.
Speaking to the Confidential on Nova radio programme, Eva said: "There's definitely things that are off-limits and shouldn't be asked (but) I think it is different for a reality star than it is for an actor.
"An actor goes out and acts and does work, certain things are left to be private.
"Reality stars are kind of living out their lives, that's why they are famous, because of the reality of their lives."
Khloe, who has attempted to maintain her privacy following the breakdown of her marriage to Lamar Odom last year, cut short her interview on Australian TV show 'Sunrise' after refusing to answer questions about her sister Kim's nine-month-old daughter North.
However, despite her representative confirming the interview was terminated due to discussion based around North, Khloe denied it in a series of posts on Twitter last week.
She tweeted: "Why would I cut an interview short because of North? Get over yourself Sunrise... The call dropped... stop reaching for a story.
"You are so f***ing desperate!"

'Captain America: The Winter Soldier' may crossover with 'Marvel's Agents of S.H.I.E.L.D.'
Jeph Loeb, who executive produces the TV spin-off of Marvel's movie franchise, has teased there could be a tie-in between the upcoming superhero blockbuster and the TV series.
Speaking at a PaleyFest panel discussion in Los Angeles yesterday (23.03.14), he said: "It wouldn't surprise anyone if [events from] the movie you mentioned were to happen in the show we're talking about."
'Agents of S.H.I.E.L.D.' has previously featured a crossover episode which saw the team of covert operatives deal with the aftermath of last year's 'Thor: The Dark World'.
'Thor' character Sif, played by Jaimie Alexander, also guest starred in an episode of the action series earlier this year.
'Captain America: The Winter Soldier' stars Chris Evans, reprising his role as the patriotic protagonist, Scarlett Johansson as Black Widow/Natasha Romanoff and Samuel L. Jackson as S.H.I.E.L.D. director Nick Fury.
Evans previously spoke of the injuries he sustained working on the film.
He said: "There are always injuries. Whether you end up in a cast or not doing stunt work, it's physical stuff. Even when you block a punch, that punch lands somewhere. So you're always going home with bumps and bruises and we are all getting older so it has lasting effects."

McBusted are to support One Direction on their upcoming stadium tour.
The super-group - comprised of McFly's Harry Judd, Tom Fletcher, Danny Jones and Dougie Poynter, as well as Busted's Matt Willis and James Bourne - will join the 'Midnight Memories' hitmakers this summer for their 'Where We Are' world tour in Paris, France.
McBusted wrote on Twitter: "AWESOME NEWS! We're @onedirection's special guest 21 Jun Paris Stade De France. Merci beaucoup (sic)
New dad Tom also wrote: "YES we're @onedirection's special guests on 21 June Paris Stade De France. Gonna be très awesome! (sic)"
Niall Horan is close friends with the members of McFly and has recently been writing new music with the band.
Last year, the stars worked together on several tracks for One Direction's third studio album 'Midnight Memories', with one of the songs - 'Don't Forget Where You Belong' - featuring on the record.
McBusted aren't the only acts set to join One Direction - consisting of Niall, Harry Styles, Zayn Malik, Liam Payne and Louis Tomlinson - on tour as they will also be supported by Australian boy band 5 Seconds of Summer.
The 'Where We Are' stadium tour begins in Bogota, Colombia, on April 25 and ends in Miami, Florida, in October.

Geordie Shore's Gaz Beadle is looking forward to settling down in the "next few years".
The reality star - real name Gary Beadle - says he'd like to find the right girl to spend his life with and feels he is earning enough to provide for a family.
He told Now magazine: "I genuinely love kids and think I'd make a great dad. I don't mind whether I have girls or boys - twins would be great though. Now I have some money coming in, I'm going to concentrate the next couple of years on finding a girl and starting a family."
Gaz has built a reputation as a ladies' man and confessed he's slept with over 1,000 women since he finds it easy to bed women following a club night.
Asked about how many women he's slept with, he explained: "It's probably 1,000. It's so easy to get a shag now, it's ridiculous. If I'm in a club, it's hard for me to leave alone. You're out seven nights a week and you can take a girl home every night. You can even have threesomes, so it's easy to bed 14 girls in a week."

'Emmerdale's' Ali Spencer will steal money to help Ruby Haswell have a baby this week.
Ali, played by Kelli Hollis, will face jail as she goes to extreme measures to help her girlfriend get pregnant by stealing from pensioner William Makepeace (Dudley Sutton).
Ruby (Alicya Eyo) is "desperate" to start a family, but she is caught in a moral dilemma when Ali robs William, who she cares for.
Kelli told Inside Soap magazine: "Ali knows that Ruby is desperate right now. It's a spur-of-the-moment thing when Ali takes money. With them being knocked back at the bank for a loan and worrying what Ruby's going to do next to have this baby, this has been building up. After a bit of thought, Ali probably wouldn't have done it."
Ali spots the stack of cash under William's kitchen sink while attending his birthday party with Ruby and decides to make her move.
Kelli added: "The fact that this cash is there and she can get hold of it just tips her over the edge. Ali would never have planned to take the money - it just happens."
But upon discovering Ali's theft, Ruby insists on returning the money and William's grandson Seb (James Redmond) threatens to call the police.
Kelli said: "Ruby takes the blame for the theft of the money. She thinks it's best as she and Seb are mates from way back."

Mila Kunis is pregnant.
The 30-year-old actress is expecting her first child with 'That '70s Show' co-star Ashton Kutcher, to whom she recently got engaged.
A source told People.com: "They are both very, very happy. It's still early."
The couple sparked engagement speculation after Mila was spotted with a huge diamond ring last month, but the loved-up stars aren't expected to rush down the aisle in light of their baby news.
The insider added: "It won't necessarily be a short engagement. They haven't begun planning the wedding yet."
Meanwhile, E! News reports that Mila was recently seen at a prenatal class in Los Angeles.
The couple began dating in 2012 following Ashton's split from ex-wife Demi Moore, but they have known each other for years after playing the lead roles in hit 1990s sitcom 'That '70s Show'.
Ashton, 36, is thought to have had a crush on his gorgeous co-star when they worked together, but their romance didn't blossom until years later.
A source previously said: "He was so in love with [Mila] for a while when they worked together. He thought she was a goddess, was always talking about how beautiful she is."
'Jupiter Ascending' star Mila recently opened up about her low-key date nights with Ashton, revealing they enjoy "white T-shirt nights".
She explained: "We have a thing called white T-shirt night and it's when you wear jeans and a white T-shirt and you go on a date. Nothing fancy, it's just something that you love to do - whether that's bowling or dinner or going to a cheese shop and have some wine or walking around. I think that's just the best thing to do, and sometimes it's just nice to stay home."

Johnny Depp, Hugh Jackman and Tom Cruise are in a standoff over a hotel suite.
The trio of A-list actors are all used to enjoying the luxury of an unspecified London hotel, but two of the stars are to miss out on occupying their favourite suite when they all film in the British capital later this year.
A source told The Sun newspaper: "None of these guys are used to being told they can't have something so it's a bit of a standoff at the moment.
"Hotel staff are finding it a bit awkward because they have to keep telling them it's still a problem. They're all loaded, so it's not a case of who can throw the most money around."
The Hollywood stars will all be in London at the same time to work on separate movies.
Tom, 51, will begin work in on 'Mission: Impossible 5', Johnny, 50, will film Disney's blockbuster 'Alice in Wonderland' sequel, and Hugh, 45, will play the villain in new Peter Pan adaptation 'Pan'.
Johnny recently hosted a lavish engagement party with his fiancée Amber Heard, 27, in Los Angeles.
Guests, including Aerosmith frontman Steven Tyler, Mandy Moore, top Hollywood producer Jerry Bruckheimer and Marilyn Manson.

Emma Watson says 'Harry Potter' was a "huge burden" for its directors.
The actress played Hermione Granger in the wizard saga, and she admitted the filmmakers across the series - Chris Columbus, Alfonso Cuarón, Mike Newell and David Yates - all faced a huge amount of pressure.
She told the Mail on Sunday newspaper's Event magazine: "I do know what it takes.
"Each of the 'Harry Potter' directors looked as if they had aged about 10 years by the time they'd finished. It's a huge burden to carry."
Her experiences working on the eight movies - adapted from J.K. Rowling's seven-part book series - means she sympathised with the task facing 'Noah' director Darren Aronofsky on the biblical blockbuster.
She said: "Darren doesn't shave during films, so there was this kind of dilapidation that happened throughout, where by the end of it he looked like this mad caveman."
Watson - who stars in the film as Ila - admitted she wasn't sure about taking on the role until Aronofsky laid out his vision for her.
She explained: "To be honest, the idea of making a film of Noah seemed really cheesy to me - the dove and the rainbow the two-by-two ... Darren is the lord of darkness and grittiness.
"And then he explained it to me as this really interesting post-apocalyptic world - not set in the past, but not set in the future, and not a sandal in sight."