Never meet your heroes, they say.

Just nine years ago biology student Jennifer Kowalski and her sister Lisa were among 15 lucky fans to come face to face with Taylor Swift backstage in Glasgow.

The pop megastar, in the midst of her 1989 world tour, looked thrilled as the Scottish Swiftie siblings lifted her in the air after her sell-out show to 14,000 people at the SSE Hydro Arena in 2015.

The sisters were wearing Tay Tay-inspired dresses and had even adapted their white  trainers by writing 1989 on them before the dream-come-true meeting.

But today Jennifer was one of two Just Stop Oil zealots who broke into Stansted armed with fire extinguishers filled with orange paint in search of her idol’s private jet, which landed at the airport last night carrying her parents.

Swifties haven’t been happy with her use of private jets and at 5am this morning Kowalksi and co-conspirator Cole Macdonald, 22, defaced two planes on the Tarmac in the VIP area of the airfield – but apparently couldn’t find Taylor’s.

The friends hugged after the attack and laughed as they said into camera: ‘We just spray-painted the f*** out of this private jet – and the one behind’.

MailOnline can reveal how Kowalski had once considered Swift her hero, calling her a ‘legend’ and claiming a lyric about being ‘polite’ but ‘powerful’ was her favourite quote.

Jennifer Kowalski (left) and her sister Lisa list up Taylor Swift backstage in 2015. Today former Swiftie Jennifer broke into Stansted searching for Taylor’s private jet armed with orange paint – all in her support of Just Stop Oil

Kowalski (left) and her co-conspirator Cole Macdonald (right), who was in court last month

Jennifer Kowalski, 28, (pictured) is one of the JSO protesters who broke into Stansted to spray-paint private jets

Kowalski shared this collage of Taylor Swift on her Facebook page while she was a university student

Macdonald outside court with a Palestine flag

Taylor Swift’s plane (left) after landing at Stansted last night

On board was Swift’s father Scott (pictured) and mother Andrea as well as personal possessions and what appeared to be wine.

Several stones were covered in the substance before the protesters stopped and sat cross legged on the grass

The Prime Minister continued: ‘Just Stop Oil should be ashamed of their activists, and they and anyone associated with them, including a certain Labour Party donor, should issue a condemnation of this shameful act immediately.’

Labour leader Sir Keir Starmer said ‘Just Stop Oil are pathetic’ after activists from the group targeted Stonehenge.

In a tweet, he wrote: ‘The damage done to Stonehenge is outrageous. Just Stop oil are pathetic. Those responsible must face the full force of the law.’

Historian Tom Holland, who has previously hailed Stonehenge as one of Europe’s most precious prehistoric sites, also criticised the attack.

He wrote on X: ‘Parade your concern for the planet by destroying endangered lichens. Sympathy transmuted into utter loathing.’

Wiltshire Police said officers had attended the scene and arrested two people.

A spokesman added: ‘At around noon, we responded to a report that orange paint had been sprayed on some of the stones by two suspects.

‘Officers attended the scene and arrested two people on suspicion of damaging the ancient monument.

‘Our inquiries are ongoing, and we are working closely with English Heritage.’