Britain's Prince William invited his in-laws to Queen Elizabeth's Sandringham estate over the weekend.
The royal treated Duchess Catherine's parents Carole and Michael Middleton to a luxury weekend at his grandmother's Norfolk abode, where they celebrated their 34th wedding anniversary with a family barbecue.
A source told the Daily Mail newspaper: "William invited them to Sandringham. He wanted to show them around Anmer Hall. They had a barbecue on Saturday afternoon. Mike helped William, while the ladies entertained Prince George."
Since renovations to the Duke and Duchess of Cambridge's new residence of Anmer Hall are not yet finished, the party are said to have stayed overnight at Wood Farm, a 17th-century country house on the royal estate.
William turned 32 on Saturday (21.06.14) and Michael had his 65th birthday yesterday (23.06.14), so the get-together also served as a joint celebration.
Upon his engagement to Catherine, formerly known as Kate Middleton, in 2010, William said how important it was for him to get on with her parents.
He said: "Kate's got a very, very close family. I get on really well with them and I'm very lucky that they've been so supportive.
"Mike and Carole have been really sort of loving and caring and really fun and have been really welcoming towards me, so I've felt really a part of the family and I hope that Kate's felt the same with my family."

Britain's Duchess of Cambridge's wedding dress has been voted the best bridal gown of all time.
The stunning Sarah Burton creation the 32-year-old royal wore to her April 2011 wedding to Prince William at London's Westminster Abbey has topped an online poll of the most enviable wedding dresses ever.
The sophisticated affair, with its sweetheart neckline, lace sleeves and a two-metre train, took 27 per cent of the total in a vote conducted by wrappler.com.
One fan of the Alexander McQueen designer's dress wrote: "I love Kate's wedding dress. She looked amazing and the dress was beautiful - very fitting for a princess. It's also the kind of dress that will never go out of fashion. It has a real timeless appeal."
Ranking in second place was reality TV star Kim Kardashian, who donned a cut-out lace number designed by her friend Riccardo Tisci for her nuptials to Kanye West last month.
The Givenchy Haute Couture dress polled 18 per cent of the vote, just ahead of the full-skirted Vera Wang gown Victoria Beckham wore for her lavish 1999 wedding.
Kate Moss' boho chic 2011 wedding dress courtesy of John Galliano came in fourth place, while WAG Coleen Rooney's Marchesa gown rounded out the top five.
Abbey Clancy's Giles Deacon number, 'Sex in the City' character Carrie Bradshaw's Vivienne Westwood creation and Keira Knightley's knee-length Chanel dress also proved popular with British fans, followed by The Saturdays' Rochelle Humes and Kelly Clarkson's bridal looks.

Britain's Prince Charles is visiting Middleport Pottery factory today (24.06.14).
The heir to the throne has arrived in Stoke-on-Trent in Staffordshire, England, to take a tour of newly-renovated facilities, which the Prince's Regeneration Trust (PRT) saved from closure in 2011.
As president of the PRT, Charles forked out £9 million to prevent the UK's last-remaining working Victorian ceramic factory from shutting down and workers losing their jobs.
Now the three-year renovation has been completed, over 30,000 people-a-year are expected to flock to the factory's new visitors' centre and café.
The historic site, which produces the world-famous Burleigh Pottery ware, has also doubled its workforce and taken on new buildings.
Ros Kerslake, PRT's chief executive, told The Sentinel newspaper: "The Prince's Regeneration Trust was desperate to save the building and the skills and the archive. We made Prince Charles aware of the project and he was immediately taken with the importance of what we had been asked to do.
"This will be his third visit. He loves it, he loves the site. He considers it very important, that it's the only place we have still got where pottery has been made for 125 years. He also owns some Burleigh ware."

Beyoncé and Jay Z have hired a 500 strong security team to protect them on tour.
The couple have reportedly called in the mini army to watch over them and their two-year-old daughter Blue Ivy during their 21-date 'One The Run' tour which kicks off in Miami tomorrow night (15.06.14).
The team will include 16 personal bodyguards on 24 hour watch and a 40-man security support group which will be increased on performance days by 21 specialist bouncers, 300 crowd security staff and a further 50 trained team members to stop potential stage stormers.
Venues including the famous Rose Bowl in Los Angeles have also increased their own security personnel to protect Beyoncé, 32, Jaz Z, 44, and their young daughter from potential "stalkers and kidnappers".
A source told The Sun newspaper: "Beyoncé is a keen advocate of a work/life balance and wants to show she is a dedicated working mother.
"Despite the family's billion-dollar worth, Beyoncé is keen to be the most hands on mum in music.
"They will not stop short of covering every aspect of their security, from crazed fans to potential stalkers and the unthinkable - kidnappers. Their security needs are like a military operation."
The 'One The Run' world tour - which is expected to make around £60million - will see the couple perform in 16 cities across North America before heading to Europe for a two-night stint in Saint-Denis, France.

Wayne Rooney's former fling Jenny Thompson is to enter the 'Big Brother' house.
The former escort - who made headlines after an alleged threesome with the England footballer and current 'Big Brother' contestant Helen Wood - is set to join her ex-best friend as a late entrant in the latest series of the Channel 5 reality show.
The pair haven't spoken since Helen, 27, blamed Jenny, 25, for going public with the scandalous liaison back in 2010 and show bosses are expecting sparks to fly between them, resulting in "unmissable viewing".
A source told the Daily Star newspaper: "This will be like dropping a high-incendiary explosive into the house."
Producers have even put security on standby for when Jenny enters the famous reality TV house and believe the move may lead to Helen - who has been unpopular with viewers - deciding to quit the show.
The source said: "Helen has a pass to the final and it's clear viewers hate her. Having Jenny walk through those doors could actually make Helen walk and fans would love that."
Controversial Helen recently opened up about the infamous romp as she chatted to fellow housemate Ash Harrison.
She said: "We agreed not to tell anyone because he's married and this stupid slag said my name. I hate her."
However, Jenny has since rubbished her claims.
She said: "She is a nasty person and a bully. We haven't spoken in two years."

Kym Marsh wouldn't "rule out" another marriage.
The 'Coronation Street' actress admits she would wed a third time, despite her previous marriages to 'EastEnders' actors Jack Ryder and Jamie Lomas not working out.
She said: "I absolutely haven't given up on love and I wouldn't rule out getting married again. But it's not something I've given much thought to at the moment."
Kym, 38, is in a new relationship with Dan Hooper - the ex-boyfriend of her former pal, 'Hollyoaks' star Stephanie Waring - but the actress says the romance is still developing and she isn't ready to settle down with him yet.
She told Britain's OK! magazine: "It's been three months. We've been spending a lot of time together and taking things slowly and seeing what happens.
"It's too early to say ... you've got to take your time with these things, but I am happy."
Meanwhile, Kym - who has three children, David, 19, and Emily, 16, from a previous relationship with Dave Cunliffe and three-year-old Polly with ex-husband Jamie - claims she is feeling more "positive" after a difficult year.
'EastEnders' star Jamie, 39, filed for divorce from her in October 2013 after 13 months of marriage and most recently, the 'Corrie' actress was blasted by her former friend Stephanie - who plays Cindy Cunningham on 'Hollyoaks' - for dating her ex-partner Dan, the father of her three-year-old daughter Lexi.
Kym said: "I've not had the best of luck in the past 12 months. I keep getting things thrown at me. I'm just looking to the future and hoping for better times and I'm sure they're coming or happening.
"The tide is changing and I feel lucky that I've got support from my friends and family.
"Often people don't see the vulnerable side of me but it's there."

Kellie Bright "couldn't ask for a better TV husband" than Danny Dyer.
The 'EastEnders' actress, who plays Linda Carter, has heaped praise on her on-screen husband and says Danny is "ten million times nicer" than she thought he would be.
She explained: "We'd never met before we started at 'EastEnders'. We'd never even read together at an audition and we're very different people. I said to him the other day that, on paper, you'd think we wouldn't work, and yet it works so well.
"He's ten million times nicer, funnier and more lovely than I ever thought he was going to be. I couldn't have asked for a better TV husband. He's very inclusive of everybody on set."
Kellie admits she expected Danny, who was known for his hard-man movie roles prior to joining the show as Mick Carter, to be "arrogant or cocky" before they met.
She added: "I'd never come across anyone who'd said he was horrible or up himself, so I didn't expect him to be an ogre. But I thought he might be a little bit arrogant or cocky. So many actors are selfish and self-centred, but he's just not."
The 37-year-old star, who joined 'EastEnders' with Danny and their on-screen children Maddy Hill (Nancy Carter) and Sam Strike (Johnny Carter) last Christmas, also expressed her hope that Linda and Mick remain faithful to each other unlike many other soap favourites.
Kellie told Radio Times magazine: "Danny and I would really fight for them to stay faithful. We're both absolutely adamant that that's how we want it to be. If either Mick or Linda had an affair, it would be a cop-out."

Matt Smith would have become "meaner" had he stayed on 'Doctor Who'.
The 31-year-old star, who bowed out of the titular role in the BBC sci-fi drama last Christmas, feels his incarnation of the Time Lord would have taken a darker path if he was still on the show.
Speaking at Wizard World Comic Con in Philadelphia over the weekend, he said: "If my Doctor had carried on he'd have become a bit meaner and a bit tougher. The universe would have weighed on his shoulders a little more which would have been cool."
Appearing intrigued by the idea of a darker Doctor, Matt quipped: "Damn, I should have stayed!"
Matt was reunited with his former co-star Karen Gillan, 26, during a fan panel at the event and the pair teased fans by hinting they may work together again in an adaptation of Shakespeare play 'Macbeth'.
Quizzed if he's ever played a Shakespeare character, Matt said: "I'd like to one day. I'd quite like to play Macbeth."
Karen added: "I want to play Lady Macbeth."
The flame-haired beauty's response prompted Matt to suggest: "Shall we do that together?"
The new series of 'Doctor Who', meanwhile, is currently filming and marks Peter Capaldi's debut as the Time Lord, taking over from Matt.
'Doctor Who' series eight is due to air in August.

Channing Tatum doesn't like his wife filming sex scenes.
The 'Magic Mike' star is uncomfortable with the idea of Jenna Dewan-Tatum - with who he has 12-month-old daughter Everly - getting close to her male co-stars on 'The Witches of East End' but she thinks it would be "weird" if he felt any other way.
Asked if it was true her spouse "doesn't like her having sex scenes with other men" on TV, she said: "So true."
She added: "It'd be weird if he was like, 'Ah, I'm cool with it, do whatever,' you know?
"It's never fun [shooting love scenes], but you just get really used to it, it's weird."
And the 33-year-old actress admits shooting the scenes are even more "weird" because she and her spouse are so close to the rest of the cast on the show.
She told E! News: "We're all friends, this whole cast, we hang out all the time.
"They are, like, really good friends, so it's even more awkward. 'Yeah, we have this love scene, but we were just hangin' with our wives and husbands...' It's acting, you know--it's weird."
However, Jenna insists her 34-year-old husband - who she met on the set of their 2006 movie 'Step Up' - has nothing to worry about when it comes to her male co-stars.
She added "I've kind of got the best at home."

Megan Fox and Brian Austin Green have bought Bing Crosby's old home. The couple - who have sons Noah, 20 months, and Bodhi, four months, together - splashed out $3.35 million on the 6,710 square foot ranch home, which was originally a carriage house o...

Taylor Schilling had a "painful" time at school.
The 'Orange is the New Black' actress was singled out by her classmates because of her appearance and admits she found growing up "tough".
She said: It was tough at home, and it was tough at school... And my experience was painful, so painful. There was a period of time I had very short hair, and I had glasses, and I was very tall for my age."
These days, the 29-year-old star is more comfortable with herself, and is happy not to feel "bound" by her appearance and thinks she has better things to "offer the world" than her looks.
She said: "I don't feel bound by my face or my body. I don't feel like that's the biggest gift I have to offer the world. I feel like there are more parts of me to offer than that."
Taylor plays incarcerated Piper Chapman in 'Orange is the New Black' and finds the role "liberating" because she wears a prison-issue orange jumpsuit for most of her scenes.
She explained to the new edition of Allure magazine: "It's totally liberating. There's freedom in not having to make it about how my jeans fit or what my boobs look like in a top. All I have to do now is play."

Dolly Parton claims she looks "like hell" without make-up.
The '9 to 5' hitmaker, who is known for her big hair and extensive use of cosmetics, admits she's not a natural beauty and understands what people expect her to look like on stage.
She told Radio Times magazine: "If somebody says, 'What do you look like without that make-up?, I say, 'I look like hell!' But that's OK, who doesn't? I'm not a natural beauty, that's one of the reasons I'm over-exaggerated.
"I feel better when I put on a little make-up - I don't like looking in the mirror and thinking, 'Who the hell's that old ugly woman?'"
The 68-year-old star insists she doesn't feel like "two Dollys" both on and off stage but she likes to look her best for her fans and for her friends and family.
She explained: "I'm always Dolly, because my heart is always the same, my head is always the same. And my look came from a very serious place. I wouldn't dream of going out like some of the artists do, come into a meet-and-greet with hair rollers and Clearasil on my face."
Even when Dolly is at home with her husband of 48 years, Carl Dean, she still puts on some make-up and uses a few hot rollers in her hair.
She said: "I don't want to look like a slouch with him. I'm not two different people, but I am responsible for the persona of the person that you know as Dolly Parton. I know what people expect me to look like. But I can also go home, take off all of this junk, and still be the same person."