The Real Bullitt Mustang Vanished for 40 Years — Then Sold for $3.74 Million as the Most Expensive Mustang Ever

A Highland Green 1968 Mustang GT sat mostly out of public view for nearly 40 years before its owners revealed the truth: it was Steve McQueen’s actual Bullitt car. In 2020 it sold for $3.74 million, becoming the most expensive Mustang in history.

For nearly four decades, the most famous Ford Mustang in movie history simply disappeared. There were no press releases, no auction listings, no dramatic barn-find reveal — just a New Jersey family quietly keeping a secret worth millions. The Highland Green fastback that Steve McQueen threw through the hills of San Francisco in 1968’s Bullitt wasn’t lost, stolen, or scrapped. It was parked in a garage, driven to the grocery store, and eventually retired when its clutch gave out. When it finally reappeared decades later, it didn’t just make headlines. It became the single most valuable Mustang ever sold, for a price that traces directly back to the day one man decided this car was worth keeping instead of cashing in.

The footage above captures the moment itself: the 2020 Mecum Kissimmee broadcast of the actual Bullitt Mustang crossing the auction block. An estimated 25,000 people packed the arena at Silver Spurs Arena in Osceola County, Florida, to watch it happen in person, and the room reportedly went quiet just to hear the 390 V8 fire up and idle across the stage — the same engine note that chased a Dodge Charger through the streets of San Francisco more than 50 years earlier. Viewers who’ve since watched the broadcast online say the same thing over and over: the sound alone is what gets them, because it’s unmistakably, exactly what came out of the theater speakers in 1968.

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Owner Sean Kiernan drove the car across the block himself, with his sister Kelly Cotton riding in the passenger seat. The auctioneer opened bidding at $3,500, a number that wasn’t chosen for drama. It was the exact price Sean’s father, Robert Kiernan, paid for the car back in 1974. From there, bidding climbed fast, and when the gavel finally dropped, the number read $3.74 million, instantly making it the most expensive Ford Mustang ever sold at auction, well ahead of the previous record held by a 1967 Shelby GT500 Super Snake that had sold for $2.2 million the year before.

The Classified Ad That Started a 46-Year Secret

In 1968, Steve McQueen drove two identical Highland Green Mustang GT 390 fastbacks through the famous chase sequence in Bullitt, one of the most influential car chases ever committed to film. Shot without the elaborate rigging modern productions rely on, the sequence still holds up because so much of what audiences saw was real: real speed, real streets, and by most accounts, McQueen doing a meaningful share of the driving himself. One of the two production cars survived relatively unscathed. Ford eventually sold it off, and it passed through a couple of owners before Robert Kiernan spotted a classified ad for it in a 1974 issue of Road & Track. He bought it for $3,500. At the time it had roughly 19,000 miles on the odometer, and Kiernan had no idea he was buying a piece of Hollywood history. He just wanted a fast car.

The Kiernan family drove it as a daily commuter in New Jersey for years, right up until the clutch failed in 1980. Rather than repair it, Robert parked it in the garage, where it sat largely untouched for two more decades. He and his son Sean began working on preserving it starting around 2001, but the car stayed almost entirely out of public view — no shows, no magazine features, nothing — for the better part of 40 years while collectors and Mustang historians debated whether it even still existed.

Steve McQueen Wanted It Back. Kiernan Said No.

Robert Kiernan’s decision to keep the car quiet wasn’t for lack of offers. According to multiple accounts from people close to the family, Steve McQueen himself tried to buy the car back in the years after the film, at one point reportedly offering to trade another vehicle for it. Kiernan turned him down every time. It’s the kind of detail that separates the Bullitt Mustang from almost every other famous movie car: this wasn’t a replica built to cash in on nostalgia, and it wasn’t a car that changed hands at every opportunity in pursuit of a bigger check. It was a family possession that happened to have starred in one of the most famous action sequences in film history, and the family treated it that way for two generations.

When Robert Kiernan died in 2014, the car passed to Sean, who finished the preservation work his father had started and finally let the world in on the secret. The reveal came at the 2018 North American International Auto Show in Detroit, where the real Bullitt Mustang appeared onstage alongside Ford’s new 2019 Mustang Bullitt, a special edition built to mark the film’s 50th anniversary. From there it toured the country, appearing everywhere from the National Mall in Washington, D.C. to shows and events across the country, before Sean made the decision to sell it in 2019.

Why Collectors Call It the Most Important Mustang on Earth

What makes the car special isn’t just the horsepower, though the numbers hold up fine for the era: a 390 cubic-inch V8 rated at 325 horsepower and 427 lb-ft of torque, paired with a four-speed manual. It’s the originality. This isn’t a restomod with a modern drivetrain hiding under a vintage shell, and it isn’t a tribute car wearing someone else’s history. It’s the actual movie car, kept in largely unrestored, preserved condition by a family that valued it more than any check anyone waved at them. In a hobby full of recreations, clones, and cars billed as “one of the surviving examples,” genuine, documented originality like this is vanishingly rare, which is exactly why it commands a price no other Mustang has come close to matching.

The sale also reset expectations for what a documented movie car, or any Mustang with an ironclad, unbroken ownership history, can be worth. For everyday collectors shopping the more attainable end of the classic Mustang market, the lesson isn’t about chasing seven-figure cars. It’s about what “provenance” actually means: original paperwork, a traceable chain of owners, matching numbers where possible, and honest documentation of what’s been changed versus what’s original. Those are the same fundamentals that separate a fairly priced fastback from an overpriced one, just at a much smaller scale than $3.74 million.

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