They've met previously on several occasions, and the blossoming friendship between Sarah Brown and Naomi Campbell is clearly still going strong.
The glamorous ladies greeted each other with a friendly embrace and kisses as they met up this week.
Jointly promoting a catwalk show in aid of Haiti earthquake victims, the pair held hands as they walked together and chatted.
Models Erin O'Connor and Yasmin le Bon also accompanied the Prime Minister's wife at the London event.
Rubbing shoulders with celebrities is becoming something of a habit for Sarah Brown.
Last week the 46-year-old attended the National TV Awards where she spent time with X Factor beauties, Cheryl Cole and Dannii Minogue.
Photo: ę Rex