The trio, along with other famous faces including Jeremy Piven and Nicholas Hoult, were in attendance at Raleigh Studios in Los Angeles to witness the unveiling of the new Jaguar F-Type Coupe and were astonished by the dramatic way the vehicle arrived.
Design Director Ian Callum was introducing the car when sirens, helicopters and screeching tyres could be heard around the venue, which quickly plunged into darkness before being lit by apparent police helicopter lights.
The new white vehicle then appeared, driving down the length of the building before quickly disappearing out of sight.
Miranda posted on Twitter: ''Having a great time with @JaguarUSA at the #FTYPECOUPE reveal! (sic)''
And Kelly added: Had such a great time at the @JaguarUSA #FTYPECOUPE reveal tonight! #goodtobebad (sic)''
Meanwhile, 'X Factor' boss Simon joked the night proved why it is good to be British.
He tweeted: ''Being British has its perks! @JaguarUSA #GoodToBeBad #Ftypecoupe (sic)''
He later added: ''I had a great night at the launch of the new jaguar tonight. The car is stunning. You have to see it in real life.''