Tony Blair’s daughter Kathryn Blair was held up at gunpoint by muggers near her home on Monday evening.
The 29-year-old faced the thieves as she and her boyfriend were walking their dog shortly after the wedding of her brother Euan.
The two men, one armed with a gun, demanded cash and jewellery before suddenly running away empty-handed.
The former Prime Minister’s daughter and her partner were unhurt.
It is believed Ms Blair and her boyfriend were threatened near her townhouse in Marylebone, central London .
The pair had spent the weekend with father Tony and mother Cherie in Buckinghamshire for Euan’s wedding to Suzanne Ashman.
A Scotland Yard spokesman said: “We were alerted at around 8.30pm to two robberies in the street in the Marylebone area.