LONDON (AP) -- London Fashion Week saw its starriest and most hectic day yet Monday, as Hollywood celebrities turned up at big-ticket shows and rubbed shoulders with fashion's elite on the front rows.
Singer Harry Styles and actors Bradley Cooper and Naomie Harris dropped in at Burberry Prorsum, which led a schedule that included back-to-back catwalk action at Christopher Kane, Erdem, Issa and Tom Ford among others.
Here are highlights from Day 4:
BRADLEY COOPER SUPPORTS MODEL GIRLFRIEND
Cooper gave the fashion week some high wattage star power when he showed up at Burberry, where his girlfriend, Suki Waterhouse, was modeling the autumn and winter collection for the luxury label. He squeezed in next to U.S. Vogue editor Anna Wintour, and the two were pictured chatting and joking together.
A few hours and an outfit change later, Cooper was spotted on the front row at Tom Ford, this time with Waterhouse next to him. The pair kept a low profile, deliberately turning their backs to prying cameras. That wasn't too difficult. The show space at Ford, set up like a nightclub, was so dark that they could have gone unnoticed.
TOM FORD 'KNOCKS OFF' JAY Z
Tom Ford may be best known for his razor-sharp suits and slinky womenswear, but the designer showed a humorous side Monday with a catwalk collection that played on his own fame and rapper Jay Z.
The designer's catwalk, unveiled at London Fashion Week, featured sequined football jerseys emblazoned with the giant white letters "TOM FORD 61."
That's a playful reference to Jay Z, who recorded a song called "Tom Ford" and wore a similar jersey -- without the sequins -- at his shows. Versions of that jersey are now sold online, independent of the luxury design label. (61 refers to Ford's year of birth.)
"I just took the knock off from online, and knocked it off," Ford told The Associated Press after the show, which also featured black and red velvet dresses, sporty hoodies and animal print separates worn with high-heel boots.
Ford said the collection was about "modest luxury" and updates on 1960s shapes and the styles women wear in the American West, where he grew up.
"The first dress was actually the same dress that Navajo Indian women have been wearing since the 1920s and still wear," he said, referring to a black velvet dress that opened the show.
BURBERRY DRAWS BIG A-LIST CROWD WITH LUXURY DISPLAY
Harry Styles and Naomie Harris were among those joining Cooper at the front row at Burberry, Britain's most successful fashion house and host to the week's glitziest show.
The label showcased dozens of new variations of Burberry's bestselling trench coat, with the standout styles in putty-colored leather, hand-painted with floral designs.
There was plenty of warm outerwear to choose from, including painted shearling jackets, blanket coats and wool ponchos in bold geometric prints, and heavy blanket scarves embroidered with initials. When customers buy those scarves, they are encouraged to have their own initials added.
That personal touch and emphasis on individual craftsmanship comes at a hefty price: A sheepskin trench coat straight from the runway could set you back 6,000 pounds ($10,000.)
Designer Christopher Bailey said he wanted the collection to be "very sophisticated, and with a slight nuance of sexiness."
"It was absolutely beautiful," said Harris. "So vibrant, classic with such a modern twist, and that's what I love, because I'm personally quite classic in my taste but always wanting to jazz it up with something modern as well."
Other familiar faces on the front row included movie mogul Harvey Weinstein, singer Tinie Tempah, Topshop boss Philip Green, TV presenter Cat Deeley and celebrity photographer Mario Testino.
MANNISH, FEMININE, COOL: CHRISTOPHER KANE HAS IT ALL
Christopher Kane opened his show with tough and mannish all black outfits, and ended with little dresses that couldn't be more delicate.
The designer, one of London's favorites, offered many more looks in between. There were black plastic-looking dresses trimmed with cream fur, all-black outfits made trendy with neon green or yellow accents, sporty puffer jackets and ladylike pale pink wool coats.
If that's not enough, he added clever and surprising touches that would make anyone who wears his clothes a talking point. Memorable designs included cocktail dresses that came with sculptural 'sleeves' made of stiff ribbons that looped around the arms, or made of countless layers of thin parchment-like fabric, so that they fan out like the pages of a book as the models moved.