Kate was in familiar pieces for today’s visit to the Royal International Air Tattoo, the world’s largest military air show.
It was a big day, for this was the first time Prince George accompanied his parents on an official engagement in the UK.
The annual event is held at RAF Fairford in Gloucestershire.
The show is put on by the Royal Air Force Charitable Trust. Here is more from the Air Tattoo’s online story:
The Duke and Duchess of Cambridge have made a special visit today to the Air Tattoo to mark the 75th anniversary of the RAF Air Cadets. The Duchess, who is Patron of the Air Cadet Organisation, was present as the airshow staged its official celebrations for the Air Cadets’ 75th anniversary where they met just some of the 1,500-plus air cadets taking part in the airshow this weekend
Kate has been the Cadets’ Honorary Air Commandant since last winter when Prince Philip turned that role over to her. Some of the Cadets on parade today.
The famous Red Arrow jets.
Katre spent time speaking with pilots, support personnel, officers, and others at the event.
George, Kate, and William with dignitaries at the show.
Initially, all the noise and excitement got to Prince George, but once he had his ‘ear defenders’ on he seemed to settle down and enjoy himself.
More from The Telegraph:
The third in line to the throne was soon thoroughly enjoying himself and looked like he might follow in well established royal footsteps. He took to the cockpit of a military jet, and appeared enthralled by jets roaring above and fascinated by the hi-tech controls of planes and a helicopter.
HRH did need a boost up so he could see everything.
Clambering into one of the RAF Squirrel helicopters on display.
This is the same aircraft model that Prince William flew during his time in the Air Force.
A peek into one of those iconic red jets and a lift into the cockpit.
George looks out from inside a massive Australian Air Force tanker.
The family exiting that aircraft.
The young Prince really seemed to enjoy himself once he was acclimated.
Royal Photographer Mark Stewart has been photographing the royal family for decades and he noted on Twitter that “Prince George was a little pro for the cameras & it was great to see W & K as such hands-on parents.“
George and William pondering the underside of the helicopter. It turns out George knew a little about the aircraft. Simon Perry reported in his People magazine story that George kept repeating the words “tail rotor…tail rotor” when seated inside the chopper.
Mother and son.
I believe this is Red Arrows Squadron Leader David Montenegro that George is listening to; he appears somewhat nonplussed. 
Towards the end of the family’s visit to the show, George was given a 75th Anniversary Air Cadets piggy bank (seen in his right hand) to take home.
The Cambridges with the Chinook display team.
We move to what Kate wore for the afternoon at the air show, two pieces seen on multiple occasions: the ‘Ridley’ dress by Stella McCartney and the Smythe One Button Blazer. The jacket was first seen as Kate was heading to Canada for the 2011 North American tour; it was worn to several Olympic events in 2012; on the far right we show Kate wearing it for a SportsAid engagement in October 2013.
The jacket is made of wool and features notched lapels, a welt pocket at the bust, patch pockets at the hip, goldtone buttons, and that distinctive back cutout. We show it at Shopbop where it is available in sizes 2 through 12 ($595).
Kate wore the ‘Ridley’ dress by Stella McCartney just before the London 2012 Games when she attended a function at the National Portrait Gallery; we saw it again during the Olympic Games; when the Cambridges arrived at the Canberra airport during the 2014 tour; and also at the Commonwealth Games in July of 2012.
The garment is a fitted style, with a round neck and short sleeves. It’s made of a heavy rayon/poly jersey with a touch of elastane for stretch. One of the design elements is the position of the darts: instead of being concealed on the inside of the frock, they are exposed on the outside. (See the photo below right, or second from the left above.)
Kate accessorized with her Floret heels by favored retailer LK Bennett.
We saw the return of Kate’s ‘Alice Band,’ or headband. This is the item that prompted such vigorous conversation when she was first seen wearing it in June at the Houghton Horse Trials (below right).
The Duchess also had on her Kiki McDonough Lauren earrings (£2200).
Kiki McDonough/Splash News
It was delightful seeing Prince George out with his parents; he seemed to be a favorite with the crowds attending the Air Tattoo as well as those with active roles in the staging of the show.
It is amazing to see how big he has gotten as he nears his 3rd birthday. For loads more photos with George and to learn more about what he wore visit our sister site, What Kate’s Kids Wore.
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Also today, our final poll showcasing looks from Kate’s busy week in mid-June.
The week kicked off with Kate wearing a new gown for the annual Sports Ball; she chose the royal blue ‘Nansen‘ by designer Roland Mouret for the occasion. Accessories included a new (to us) pair of Cartier Trinity earrings, Gianvito Rossi Sisely Sandals, and her Prada clutch.
At the National Service of Thanksgiving, the Duchess was in a new Catherine Walker coatdress. She carried her Nina Clutch in trench by LK Bennett; wore her Gianvito Rossi heels in the ‘praline’ color; as well as a Jane Taylor hat. We also saw Kate’s UFO aqua/diamond earrings along with a new pendant that appears to be aquamarine and diamonds too. 
For Trooping the Colour Kate wore her Alexander McQueen coatdress, a new hat by Philip Treacy, her Mappin and Webb ‘Empress’ pendant and a new pair of earrings believed to be Balenciaga’s ‘Giant Pearl’ style.
At Sunday’s rainy Patron’s Lunch Kate was in a new dress by Roksanda Ilincic. She accessorized with LK Bennett’s Fern heels and Nina clutch. For jewelry she wore the Mappin & Webb Empress pendant and earrings.
At Monday’s Order of the Garter ceremonies, Kate wore an ensemble dating back to the 2011 North American tour, a coat and dress from Catherine Walker. The Duchess brought back a rich red Lock and Company hat, along with an Alexander McQueen clutch and a new pair of red Gianvito Rossi heels. The jewelry included her trusty Mappin and Webb Empress pendant, the diamond bracelet seen previously and the custom acorn/oak leaf Robinson Pelham earrings first worn for her wedding in 2011.
For a garden party in Northern Ireland the Duchess wore two garments seen on multiple occasions, a Collette Dinnigan lace dress and Day Birger et Mikkelsen coat. She had on a new chapeau, the Morning Rose Perching Hat from Lock and Company. We saw her Nina clutch and Fern heels again, both items by LK Bennett. For jewelry Kate was in new earrings that looked like a customized version of Kiki McDonough’s Eden Diamond Flower Drop Earrings, along with the shamrock brooch worn on St. Patrick’s Day when she has presented shamrocks to the Irish Guards.
When attending Royal Ascot for the first time Kate chose the Dolce and Gabbana Cotton Blend Lace Dress first seen at the Queen’s Royal Windsor birthday spectacular. She also wore new earrings, pearls suspended from what looks like a blue topaz surrounded by diamonds; these remain unidentified. She debuted a new hat, the ‘Una,’ style by Jane Taylor. The Duchess carried her LK Bennett Natalie clutch and wore the praline Gianvito Rossi suede heels. 
LINKAGE:
- Learn more about the RAF Air Cadets at the group’s website here; its Facebook page is here and Twitter feed here
- The Royal International Air Tattoo website is here; the Facebook page is here and Twitter feed here
- The Mirror’s story is here; The Telegraph’s story is here; The Daily Mail’s photo-laden story is here
- Popsugar’s gallery of large photos is here; Simon Perry’s People magazine story is here
Rachel
Saturday 23rd of July 2016
I just love the headband. Beside the fact that I, 33years old, have good memories of mothers around me wearing it when I was young, I think the duchiess of cambridge clearly made the priority by avoiding her hair blowing in her face while watching George. She prioritize her role as the mother of George above being a style icon and I truly apprieciate that!
Amy
Wednesday 13th of July 2016
She's stylish, and as beautiful as always. I love the whole look. The hairband, the earrings, the jacket, dress and shoes. She's polished, elegant and ultra presentable. I think she's completely savvy about how she should dress for which occasions. If she wants to wear pumps to an air show, or diamond earrings with a plastic headband, more power to her.
katefanatic
Monday 11th of July 2016
I think this is a lovely outfit (minus the headband) but I do think she could have worn tailored trousers and still been dressy enough as patron of the cadets. What about navy trousers, a lovely white blouse and the blazer she did wear? She could have worn dressy flats or kitten heels and not had to worry about it riding up when she sat/climbed in helicopters and planes and while bending over to pick up George. She could still have had a "uniform" that complemented the colors. Also a ponytail or a lovely braid of some sort would have kept the hair out of her face and still been polished.
George was so adorable and he is growing so quickly and William seems an attentive father and husband.
Becky
Monday 11th of July 2016
I love this dress and blazer - classic and simple but still very well-made and pretty on Kate.
I don't love the shoes or the headband. I was fine with the headband at Houghton House, but here it just does not seem to go with the rest of the outfit.
KateZena
Monday 11th of July 2016
I have commented about this all ready, but I want to say I love Kate's outfit. As a "retired" military child looking at Kate's outfit for a military function, this outfit is perfect. Civilians typically don't understand that Kate - as a military wife - as obligations at military affairs such as this. The military in the UK and US are still conservative in terms of how couples interact and how a wife must look and raise their children. In military functions such as this, Kate must play the part of an obedient military wife and dress the part, meaning she and her children must wear Sunday best: a dress is preferred, with a sweater/blazer, and either dressy flats or heels. That is the definition of Sunday best to the military. Children must be in a dress (girls) and appropriate shoes to match or what George is wearing. I want those who have not experienced military life to know to have dressed in slacks or jeans and to have had her hair in a ponytail would have reflected poorly on William in the eyes of the military. A sleek chignon would have been acceptable, but her hair down is perfect as well.
The colors she picked are perfect as well; they are a reflection of the RAF. If you notice, the blazer is close to RAF blue, which all the officers are wearing. Blue, in general, is quite patriotic and works quite well if you are a wife of the military. Wives typically try to stay within the patriotic realm - red, white and blue - for events like this.
Her accessories keep in mind where she is, so they are meant to not get stuck in airplanes. She is very conscientious of her roles and makes sure to blend them smoothly. This isn't just an outfit that could work for her being royal, it's also perfect for her being a military wife and a mother.
Audrey
Monday 11th of July 2016
"Kate must play the part of an obedient military wife and dress the part"...yes, but she is also there as Duchess of Cambridge (a role that requires dressing the part in and of itself) and as Royal Patron to the Air Force, not just as William's wife. I don't recall reading anywhere that they were attending the Air Tattoo BECAUSE of William's connection.