She's pals with Naomi Campbell and Paris Hilton, has her own Twitter account and even went to Glastonbury.
And now Sarah Brown is raising her profile even further by taking part in the Gay Pride march this weekend.
"Sarah wanted to show her continued solidarity for the gay community by taking part," says a Downing Street spokesperson.
It'll be the first time a prime minister's wife has ever taken part in the annual London parade, to highlight support for the gay rights movement.
Gordon Brown won't be marching for security reasons. Instead he'll be hosting a morning reception for organisers before the Saturday event kicks off.
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