She is one of the most famous British actors of stage and screen, so you might expect Dame Judi Dench to have an opulent birthday cake to celebrate turning 83 this year.
But instead the Oscar-winner, thought to be worth £26 million, blew out the candles on a £7 Colin the Caterpillar cake from M&S.
Dame Judi's daughter posted a picture on Twitter of the beaming Hollywood star with the cheap and cheerful chocolate cake, which has become almost as iconic a symbol of British culture as the veteran actress herself.
And her fans went wild over the photo, remarking that it may be 'the most British thing ever'.
Dame Judi Dench celebrated her 83rd birthday on Saturday with a £7 Colin the Caterpillar cake
The cake has become a staple at children's parties and office birthday celebrations since M&S first launched the caterpillar cakes in 1990, with 7 million of them sold.
You would struggle to find a British citizen who hasn't tucked into one of the catepillar-shaped smiley-face chocolate cakes in their lifetime.
And now it can be revealed that the cakes have one very famous fan in Judi Dench, the star of countless films from Shakespeare In Love to James Bond.
Dame Judi, whose birthday was on Saturday, was photographed with a Colin cake that had six lit candles on top, by her daughter, the actress Finty Williams.
Her fans loved the fact the millionaire actress celebrated with a cheap and cheerful cake from M&S that has become a staple at children's birthday parties
She paid a loving tribute to her mother, captioning the image: 'Happy birthday my beautiful, wonderful, inspirational Mama.'
Fans were thrilled that their favourite actress was a fan of such simple pleasures, and called the image the 'most British thing ever'.
One said: 'It's nice to know that even Judi Dench is given that office birthday stalwart Colin.'
Another joked that the cake was 'why she should be prime minister,' while another added that it was yet another 'reason to love Judi Dench'. One declared she 'couldn't love her more'.
Dame Judi will present a documentary about her love for trees as part of the BBC's Christmas TV programming, which has also caught the public's eye.
She will show the cameras around a secret woodland she has been tending to for 30 years.
She reveals that her trees are dedicated to loved ones who have passed away, including her late husband, Michael WIlliams, who died of lung cancer in 2001.
Her closest companion now is her 'chap' conservationist David Mills, 74, who runs the British Wildlife Centre in Lingfield, Surrey.
The pair do not live together but spend a lot of time as a couple, and say they share a passion for trees