At first sight, the French First Lady may seem to have little in common with the wife of the British Prime Minister.
Carla Bruni-Sarkozy is a super-glam model and singer as well as being wed to the man the French call President Bling-Bling. Sarah Brown has concentrated on being a mother since she married Gordon Brown, a man many see as dour.
But they'll have a lot to talk about during the state visit this week. Both have toned down their natural style as the wife of a head of state. Madame Bruni-Sarkozy, 40, has contrived to be criticised for dowdy dressing. The sensible suits worn by Mrs Brown, 44, are only remarkable when compared to the flamboyance of her predecessor.
A PR expert, Mrs Brown might have advice for her counterpart. As a performer, the French First Lady could offer tips to Mrs Brown before she makes her first televised speech on Thursday.