None of the family members were at home when the fire happened, but a member of their staff was treated for smoke inhalation.
A fire service spokesperson said that a faulty lamp is believed to have caused the fire shortly after 7am.
Thanks to a quick reaction from the housekeeper, the home only suffered minor damage to the hallway.
It�s not the first time the house has been hit by a blaze. In March last year the Osbournes had to flee from the house after a fire broke out in their living room.
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