Comedian Michael McIntyre was robbed by two men on a moped while he was parked outside his children’s school, his publicist said.
The men smashed his car windows with a hammer on Monday before taking his watch and fleeing, it was reported.
His wife Kitty said the star was “fine” after the robbery at about 14:00 BST on North End Road in Golders Green, north-west London.
Asked if they were concerned about the family’s safety, Ms McIntyre said “no”.
“The victim was stationary in his car when two males on a moped smashed the car windows with a hammer before stealing property,” the Metropolitan Police said in a statement.
Police said no injuries were reported and no arrests have been made.
Local residents spoke to BBC Radio London following the robbery.
One woman, who did not want to be named, said: “I’ve lived here for years, and normally the trouble is down the other end of the road towards Hampstead.”
She said Hampstead seemed to be increasingly targeted because it is a wealthy area.
But another resident, who has lived on the leafy road for 30 years, said: “I’m not worried because I don’t wear a Rolex and don’t drive around in a Range Rover.”
McIntyre is a stand-up comedian and host of Saturday night entertainment series Michael McIntyre’s Big Show.
His UK tour in 2012, during which he played to over 700,000 people in 71 venues including 10 nights at London’s O2 arena, reportedly earned the comic £21m.
McIntyre has also been a judge on Britain’s Got Talent and has appeared on numerous quiz panel shows.
Meanwhile, a gang on scooters armed with knives and hammers reportedly raided a jewellery store in Regent Street.
Police said the suspects stole “several items of property”.
One man has been arrested on suspicion of robbery.
BBC News correspondent Andy Moore said: “This is the sort of thing that’s happening on a daily basis on London’s streets.
“It is a problem elsewhere but it seems to be the capital is suffering terribly.”
The number of offences carried out by criminals using mopeds in London has increased from 827 offences in 2012 to more than 23,000 last year.
Data obtained by the BBC showed during that period, more than 40% of such offences happened in just two boroughs – Camden and Islington.
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