He is certainly not afraid of sharing an opinion, no matter how cutting it might be.
And after apologising to Adele for calling her fat, Karl Lagerfeld has now found fault with the Duchess of Cambridge's sister, Pippa Middleton.
The Chanel designer, 78, was commenting on Miss Middleton's style, when he admitted that he admired only the rear view of her.
I like that kind of woman, I like romantic beauties.
High standards: Karl Lagerfeld admitted that Miss Middleton is not as attractive as her sister
High standards: Karl Lagerfeld admitted that Miss Middleton is not as attractive as her sister
'On the other hand, her sister struggles,' he continued.
'I don't like the sister's face. She should only show her back.'
No doubt the younger Miss Middleton's fans, who have dubbed the 28-year-old 'Her Royal Hotness', will not be best pleased.
It is not the first time Mr Lagerfeld has voiced his opinion on the Middleton sisters.
At the launch of his pop-up beauty boutique in London's Covent Garden last week, the designer was full of compliments for Kate - even defending her style against critics who might deem it dull.
He said: 'She knows pretty well what to wear and what to do. She has a divine silhouette so she can wear anything.
'She has a sense of what's right for the moment because you can not dress like a mad woman in those situations.'
