Victoria Beckham was spotted entering from the back door for David Cameron's wife Samantha's No 10 fashion week reception.
The 38-year-old singer was driven to the rear entrance of the PM's house, which was being used by royalty and US president Barack Obama, the Sun reported.
Posh arrived at 6.30pm and left at 7pm, just after 30 minutes, by the same door.
A witness said that no one could understand why she had gone through the back. It was real cloak-and-dagger stuff.
Meanwhile, Salma Hayek, model Helena Christensen and fashion designer Donatella Versace were seen happily posing for photos by the famous Downing Street door at the British Fashion Week bash.
According to Posh's agent, Downing Street suggested the back door, so she didn't have to get out at the main gate and walk.
She further added that the mum of four did not stay for long as Becks was in France and she did not want to leave their children for too long. (ANI)