Foreign Minister Julie Bishop has taken a not-so-diplomatic swipe at US President Donald Trump for praising the French first lady's body shape, questioning whether she would pay him the same sort of compliment.

During his official visit to France last week Mr Trump was heard telling Brigitte Macron she was in "such great shape".

In a video posted on social media by the French government, Mr Trump then looks at Emmanuel Macron and repeats his comments - "she's in such good physical shape" - before turning back to Mrs Macron and saying "beautiful".

The exchange has led to more accusations of sexism against the 71-year-old president, who is often criticised for his remarks about women's appearances.