Jourdan Dunn

Kate Moss was one of eight British models to strut her stuff at the Olympics Closing Ceremony last night. She — along with Georgia Jagger, Stella Tennant, Naomi Campbell, Karen Elson, Lily Cole, Lily Donaldson, and Jourdan Dunn — were wheeled out into the stadium inside billboard-sized images of themselves. They burst through the paper to reveal themselves in the flesh, clad in various gold-toned dressed designed by British designers. David Gandy was the lone male model to join the group. Kate wore a gown by her late friend Alexander McQueen, while Georgia wore something from Victoria Beckham. The gang made their way around Olympic Stadium to a medley of David Bowie songs, including his tune "Fashion."

"I was born Aug. 3, 1992, and Jourdan was born Aug. 3, 1990. We're birthday twins," Karlie Kloss told i-D last year. And though this year the two won't be spending their special day together — Kloss is headed to Denmark with her family, while Dunn is en route to London — they're still on each other's minds. "I wouldn't wanna share this day with anybody else except my main bitch Ms Kloss!!! love you!" Dunn tweeted earlier today. "Right back at you. How'd I get so lucky as to have a BFF/Bday twin/SoulMate like you?" was Kloss's prompt response.

In honor of the occasion — or as Karlie Kloss calls it, "National Jourlie Day" — here are our favorite snaps of the model pals.

>> Karlie Kloss is growing up: she turned 18 last August, and it seems like she's comfortable showing more skin these days. She stripped down for the cover of i-D's Spring 2011 Exhibitionist Issue alongside her best friend Jourdan Dunn, holding a strategically placed hat, and inside the magazine there's more of the same — modest poses in no clothes or a convenient crop job.

"Jour Jour" and "Kar," as they call each other ("We're too lazy to say each other's full name!" Kloss says) — or "Jourlie," which Dunn explains is what "people call us when we're together," also gave an interview together. Among the things we learned:

They share a birthday: "I was born Aug. 3, 1992," Kloss says, "and Jourdan was born Aug. 3, 1990. We're birthday twins."

They're both serially late: "Our call time [for the i-D shoot] wasn't until 4 pm," Kloss says, "so we spent the day apartment hunting in New York. Then had a bite to eat at a little diner before heading to the shoot. We still ended up being 25 minutes late! Both of us have serious problems being on time…"

Karlie's favorite part of her body: "Karlie is obsessed with her bum," Dunn says. "She loves it."

Jourdan is no longer with the father of her son, who was arrested a year ago: "Last year was a tough year for me. I went through a lot with my personal life but thank goodness my Mum was there for me every step of the way. I'm now not scared of being a single mother."

Jourdan didn't have to diet, post-baby: "To be honest, I didn't work out or follow an eating plan. I was loving my new body so much I was trying my hardest to keep the baby weight on! I breast fed for nine months though and people say breast-feeding helps you lose weight."

Karlie wants a big family: "[My longterm dreams are] to go to medical school and start a big family of my own… I want five boys!"

Jourdan loves her some fried chicken: "I've been known to turn up to a show with KFC! I don't care. If I need to eat, I'm gonna eat."

Jourdan's son, Riley, has sickle cell disease: "The hardest thing is not knowing if Riley is just miserable or if he's in pain and having a crisis. Last December he had his first crisis, and he was submitted to hospital for a blood transfusion. It was the scariest thing. All I wanted to do was take the pain away… I felt helpless as a mother. But now we have experienced his first crisis we are more prepared and know what to look out for."

Jourdan's most fun night ever involved Abbey Lee Kershaw getting locked in a bathroom: "We went to the Versace party in Milan with Abbey Lee. Abbey got locked in the toilets for an hour and we couldn't get her out! I will never forget that."

Jourdan Dunn and H&M teamed up to show us the retailer's latest Spring offerings — available at select stores tomorrow — and we can't help but to be inspired by their romantic preppy theme. The array of striped tees and navy shorts, bright pants and nude tops, and floral dresses and lightweight scarves are just begging for a story to go with them. So click on to see the rest of the casual chic lookbook, and where you should wear it!

>> Prabal Gurung had us at look number one — when Karlie Kloss stomped out in a brilliant red dress, sexy in its full party skirt and sleeve nonchalantly slipping off one shoulder. The designer says he was dually inspired by John Singer Sargent’s A Parisian Beggar Girl and Miss Havisham from Great Expectations for Fall 2011, but really, it was about a simple challenge: "Can I do undone? . . . After such a long time of tight, short dresses constantly, I thought that was something so chic.”

Gurung returned to his dressier roots after last season's more sportswear-driven stint — there were textures galore (furs, sequins, intricate appliques and the like, which made for some expensive-looking pieces). But that's not to say that the collection was uber feminine; in fact, with its black leather moto gloves and leather lashings around the waist, it forayed into edgier territory than Gurung has tried in the past. Pink hair streaks (which have also been spotted this week on stylist and WSJ contributor Lauren Goodman and the model Charlotte Free) finished off the look, and evidence that the designer's star keeps rising came in both the caliber of model cast (Kloss, who walked Gurung's show for the first time, Constance Jablonski, Jourdan Dunn, Joan Smalls, Liu Wen) and the number of editor-in-chiefs in the front row (including Robbie Myers, Emmanuelle Alt, and Anna Wintour, who was joined by Bee Shaffer).

>> Karlie Kloss, Jason Wu's usual runway opener, was at his show as usual . . . but this time, she walked second to last — Daphne Groeneveld opened, and Kloss's best friend Jourdan Dunn closed. But that wasn't the only big change Wu made for this season — though known for his use of color, Wu's Fall 2011 collection — "baroque American sportswear," as he called it — is primarily black and white.

Gold was also on the designer's mind, thanks to his inspiration — the restoration of Versailles. He had the models walk on a slippery runway of gilded antique mirrors, some with gold paint in their hair, in gold-dipped stiletto heels. Lace, too, played a major role — a number of models wore structured lace Maison Michel masks, and Wu incorporated more than 15 different types of lace, specially woven in France, into the collection.

It was the end of an intense marathon for Wu — he said backstage that he slept only two hours last night, and hadn't eaten in two days.