Brad Pitt, Rod Stewart and Gordon Ramsay led the stars stepping out in force to for the Las Vegas Grand Prix on Friday.
Celebrities have flocked on masse to watch the inaugural event - as drivers race to the backdrop of several Vegas landmarks, including the Bellagio fountains, Mandalay Bay, Caesars Palace, and the new ball-shaped MSG Sphere.
Hollywood star Brad, 59, led the arrivals as he cut a casual figure in a grey jumper while standing in the pit lane at the Heinekin Silver Las Vegas Grand Prix, ahead of Saturday night's big race.
Brad is set to star in a Formula One based film, and filmed footage on location during the first half of the F1 season, including shots of him driving a Formula Two car with an added Formula One aero-package at the Silverstone Circuit in July.
He paid a visit to the Grand Prix amid his busy schedule shooting with director Joseph Kosinski for the untitled film, in which he plays a veteran Formula One ace who comes out of retirement to train an up-and-coming driver.
A-list guests: Brad Pitt (pictured), led the stars stepping out in force to watch the Las Vegas Grand Prix on Friday
Fun times: Rod Stewart was also seen playfully posing with Gordon Ramsay in the Red Bull Racing garage
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Brad was seen stopping to chat as he watched Friday's practice, which descended into chaos when a drain cover came loose on the track.
Elsewhere, singer Rod, 78, and celebrity chef Gordon, 57, were also seen catching up in the Red Bull Racing garage.
Rod cut a suave figure in a vibrant yellow velvet suit, which he styled with a patterned waistcoat and a white shirt.
Gordon opted for a more casual figure as he sported a white T-shirt and a marl cardigan as he chatted to Rod, who playfully posed for the cameras.
Rod was also joined by his wife Penny Lancaster as they paid a visit to the Grand Prix ahead of the star's gig in Las Vegas.
The rocker is currently performing his The Hits residency at Caesars Palace, with the Formula One also taking place in Sin City on Sunday November 19.
Meanwhile, Gordon - who recently welcomed his sixth child, a boy named Jesse James, with his wife Tana, 49 - was accompanied by his daughter Holly, 23.
All smiles: Hollywood star Brad, 59, led the arrivals as he cut a casual figure in a grey jumper while watching the pit lane at the Heinekin Silver Las Vegas Grand Prix
Racing: Brad is set to star in a Formula One based film , and has been filming footage on location during the first half of the F1 season
Good form: He paid a visit to the Grand Prix amid his busy schedule shooting with director Joseph Kosinski for the untitled film
Busy: Brad was seen walking the pit lane and stopping to chat ahead of the practice, which descended into chaos when a drain cover came loose on the track
Sweet: Rod cut a suave figure in a vibrant yellow velvet suit, which he styled with a patterned waistcoat and a white shirt, as he posed with his wife Penny Lancaster
Visit: Rod paid a visit to the Grand Prix and was seen posing with the Red Bull Racing team ahead of his gig in Las Vegas
Trendy: Gordon opted for a more casual figure as he sported a white T-shirt and a marl cardigan as he chatted to the Williams Racing team
Family: Gordon - who recently welcomed his sixth child with his wife Tana, 49 - was accompanied to the Grand Prix by his daughter Holly, 23 (also pictured: Amanda Smerczak)
Geri Horner also supported her husband Christian Horner - who is the principal of Red Bull Racing - as she joined him at the star-studded Grand Prix.
The Grand Prix has been packed with entertainment as Kylie Minogue took to the stage during the opening ceremony on Thursday as the headline act.
The casinos and clubs have packages catered for fans looking for something to do while waiting for the cars to hit the track late each night, including Kylie's show.
Other acts at the glitzy ceremony included Tiesto, John Legend, Journey, Keith Urban, Jared Leto, Steve Aoki, J Balvin and Andra Day.
Las Vegas Grand Prix events are scheduled for November 16 through 18, with the race itself happening on Saturday night.
The last time the city had hosted an F1 race had been in 1982 when it was home to the Caesars Palace Grand Prix.
However, Friday descended into farce as practice was abandoned after only eight minutes when a drain cover came loose on the track, causing substantial damage to Carlos Sainz's Ferrari.
And furious fans - some of whom paid $200 to be there - were then kicked out before the second session could begin at 2:30am local time, two-and-a-half hours later than scheduled.
But drivers headed back to the track on Saturday night - where Ferrari favourite Charles Leclerc claimed pole ahead of his stricken teammate, Sainz.
The Spanish driver even honored a commitment to appear at a fan event in the city and looked to be enjoying himself alongside his fellow Ferrari driver Charles Leclerc.
Event chiefs will be praying Thursday's track fiasco becomes a distant memory at the end of a weekend in which 105,000 F1 fans - including some paying up to $185,000 (£150,000) - pack out the Sin City circuit.
Glitzy: Paris Hilton donned a sparkly race suit as she mucked in and jumped into a McLaren race simulator at an exclusive Hilton party at Virgin Hotels
Crowds: Renee Zellweger looked to be soaking in the view as she watched on in wonder, wearing a rigged cap and her hair in a loose bun
Suave: Patrick Dempsey - who was recently voted People's 2023 Sexiest Man Alive - congratulated victorious Charles Leclerc after qualifying