Keira Knightley has long trumpeted her high / low credentials – denim shorts and a 2.55 bag, anyone? Calling yourself normal while swanning about in a load of couture? – but, on waking this morning, we were surprised and not a little amused the star has come to represent both ends of the luxe scale.

At one end, she’s the star of Karl Lagerfeld’s new 15-minute film Once Upon a Time, set in the first Chanel boutique in Deauville, around 1913. At the other, a High Court judge has waded in to say that he thinks Keira and her Klaxons husband James Righton’s wedding last weekend sets a perfect example of a low-key ceremony to young couples.

Describing Keira  as ‘a class act’, he told The Times, ‘[Wedding] costs have got out of hand and it is very sad if it puts people off – if people thought that they could not get married unless they had a glittering celebrity-style wedding, I think that’s tragic.’

Hey Sir Paul, you may be an expert in family law, but you are not an expert in fashion, we’d wager, and to some, getting married in ballet pumps when you have access to the very best shoes in the world could also be described tragic.

But Sir Paul is a big fan of thrift and parsimony, you see, having set up a charity called the Marriage Foundation, which encourages people to not break up, with catchy taglines like ‘mend it, don’t end it’.

He clearly hasn’t factored in the start-up costs of buying a gite in the South of France, where the actual party was held.

Meanwhile, we can always count on Karl to provide us with beautiful images of Keira in Chanel and even though we don’t have the wedding photos we envisaged, we can more than make do with this latest film. Packed full of familiar fashion faces (Lindsey Wixson, Tallulah Harlech, Stella Tennant), it is endearingly eccentric and strangely fabulous.

Keira plays Chanel with an English accent but very much looks the part as Chanel, who, of course, never married. At one point in the 15-minute film, Knightley as Chanel talks about her love of jewellery and gestures to a friend, saying, ‘She wants marriage, I want pearls.’

Sir Paul and the Marriage Foundation would not have approved.