Nick Knowles and Ed Westwick were among the stars to attend the fourth and final day of the Cheltenham Festival on Friday.
DIY SOS star Nick, 60, looked sweet in a three-piece suit as he stepped out alongside his tartan-clad girlfriend Katie Dadzie, 32.
Elsewhere, actor Ed, 35, and his girlfriend Amy Jackson, 31, looked stylish in their chic ensembles as they arrived at the event.
Despite Gloucestershire Racecourse relaxing its strict dress code for the first time in its 200-year history, the celebrities made sure to dress to impress.
Nick paired his pinstriped suit with a white shirt and layered a tan tweed jacket over it.
Race day: Nick Knowles, 60, and his girlfriend Katie Dadzie, 32, were among the stars to attend the fourth and final day of the Cheltenham Festival on Friday
Star studded: He was joined at the event by Ed Westwick, 35, and Amy Jackson, 31, who looked stylish in their chic ensembles as they arrived at the event
He wore a paisley-patterned tie and a tan fedora hat as he walked hand in hand with Katie.
She stood out from the crowd in a pair of bold shorts that she paired with a long matching jacket.
Katie kept warm in a black turtleneck and designer tights, while boosting her height with a pair of thigh-high suede boots.
Ed showed his inner Peaky Blinder in a navy blue flat cap with a plaid blazer and wool overcoat.
He completed his outfit with a white shirt, khaki pants and a light gray tie.
Amy put on a very sophisticated show in shades of brown, pairing a turtleneck with wool blend check trousers.
The actress kept warm in a tan coat and chocolate leather gloves, and elevated her body with a pair of heeled knee-high boots.
She paired her look with a crocodile print handbag and straightened her long dark hair.
Smart: DIY SOS star Nick looked suave in a three-piece suit as he stepped out alongside his tartan-clad girlfriend Katie
Down with the old: Despite Gloucestershire Racecourse relaxing its strict dress code for the first time in its 200-year history, the celebrities made sure to dress to impress
Looking good: Ed showed off his inner Peaky Blinder in a navy blue flat cap with a plaid blazer and wool overcoat
Dating back to the early 1800s, the historic association event has unveiled a new ‘inclusive’ dress code this year, which organizers hope will make spectators feel ‘confident and at ease’ ahead of their visit.
This means dresses, heels and hats are no longer required as organizers hope to attract a younger crowd to the venue, wearing jeans and trainers.
In the past, some fencing required wearing a jacket and tie, while athletic shoes were also frowned upon.
Race-goers are free to wear whatever they want on the Jockey Club’s 15 racecourses in an effort to make horse racing “more accessible and inclusive.”
Instead of preventing racegoers from watching the action in certain spaces based on what they’re wearing, the Jockey Club has told its customers to dress however you feel most comfortable and confident.
The only exceptions to the new policy at any of the 342 competitions hosted by The Jockey Club are offensive costumes or clothing of any kind and replica sports shirts.
Excited: Idris Elba held up a peace sign for the cameras as he arrived at the racecourse
Suave: He looked smart in a suit and tie, which he completed with a flat cap and black lace-up boots
Sleek: He looked as slick as ever in shades of gray with a flat cap and leather boots
The announcement comes as the racecourse struggles to halt a drop in attendance.
Nevin Truesdale, Chief Executive at The Jockey Club, said last month: ‘Horse racing has always been a sport enjoyed by people from all different backgrounds and it is very important to us to be accessible and inclusive.
“We hope that by no longer expecting people to know what to wear and what not to wear, we can emphasize that racing really is for everyone.
“For those who visit our venues, a day at the races is all about spending quality leisure time with friends and family and we believe people enjoy themselves best when they are feeling relaxed. A big part of that is wearing clothes you feel comfortable in.
VIP: Idris picked up a cup of coffee for the packed day as he battled photographers on his way in
“While The Jockey Club has a rich heritage and history, it is also a progressive organization that places great emphasis on diversity and inclusion and always seeks to reflect modern trends.
“So as we examined this part of the race day experience, it became clear to us that enforcing a dress code in the 21st century seems rather outdated in the eyes of many of our race-goers.
“Of course that doesn’t mean we’re discouraging people from dressing up for a day at the races if they want to.”
“This is about giving people a choice and the opportunity to come and race dressed in the way they feel most comfortable and confident, while also taking into account the challenges that British weather regularly brings.”