He might have been married for 18 years, but Jamie Oliver has now revealed something very surprising about his relationship with wife Jools.

The couple are one of the most solid couples in showbiz and now have five children together – but TV chef Jamie recently confessed that his teenage sweetheart once suspected him of cheating.

While writing one of his 25 famous cookbooks, apparently Jools became suspicious of her hubby after he kept disappearing and arriving home with stains on his knees.

But far from getting frisky in the grass, the marks were actually from something far less incriminating.

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A post shared by Jamie Oliver (@jamieoliver) on

Speaking to Closer magazine, 43-year-old Jamie explained, “My missus accused me of having an affair once, because I kept disappearing and coming back with green on my knees.

“It was courgette season and I was in the vegetable patch!”

Jamie and Jools started dating when they were just 17-years-old and went on to marry in a lavish ceremony in Essex back in 2000.

The pair have since welcomed five beautiful children – Poppy, 16, Daisy, 15, Petal, nine, Buddy, seven, and River, who turned two on Tuesday.

The Naked Chef has also opened up about his large family, admitting sometimes it can be a little overwhelming.

He told Closer, “If it’s ever peaceful, and it sometimes is – like one day in seven – I’ll look at Jools and she’ll look at me and it’s lovely because we all love each other and we’re all eating.

“But we both know we’re always 30 seconds away from carnage!”

Meanwhile, the loved-up pair celebrated their 18th wedding anniversary last month and both took to social media with some adorable tributes to one another.

Crediting his 43-year-old wife, Jamie wrote, “Today I am so proud to celebrate my 18 wedding anniversary with this amazing woman!! Thank you so much @joolsoliver for being my soul mate on this most bonkers roller coaster ride called life, what a journey it’s been so far.”

He continued, “Thank you for being by my side, thank you for seeing things I never see, thank you loving me, for being the best wife & most fantastic mother of our 5 precious children….I LOVE YOU SO MUCH…”

Before joking, “Now stop watching love island and come find me in the garden waiting to give you your anniversary pressie….hurry up!!! Love Jamie ox x x x x.”

Jools followed in her hubby’s footsteps sharing a sweet photo from their wedding day and writing, “Happy happy anniversary my soul mate 💘 the person I want to wake up to every morning.”

AW! Congrats, guys!