Tess Daly is inconsolable after running over the family’s beloved Maltese Shih Tzu Minnie.
It is the second time inside three years that one of their dogs has died suddenly.
The Strictly star accidentally killed her pet when their builders reportedly left a door open.
Minnie couldn’t be saved after being hit by the car when Tess, 49, returned to their home.
They lost Labrador Sam in 2016 to what was believed to have been lungworm, a little-known disease.
She told The Sun on Sunday: “I’m devastated by this terrible accident. It’s a dog owner’s worst nightmare.
“It has had a huge effect on the whole family and we are heartbroken at losing Minnie.
“This has, and continues to be, a very emotional time for us all.”
Their two devastated daughters Phoebe, 14, and Amber, nine, joined their mum and dad Vernon in the Maldives after the family ploughed on with their planned holiday.
They decided to take the break to help comfort the girls, who still have tiny Chihuahua Blue.
A source said: “Tess is absolutely beyond heartbroken.
“She and Vernon have drummed it into the girls that they must never, ever let the dogs out and sure enough, the animals always stayed indoors.
“But they have had the builders in, carrying out various bits of repair work in the courtyard. And one of the labourers foolishly left the front door open — and Minnie escaped.
“Tess had been out for the morning and as she drove back in and up the driveway she was too high up in her 4×4 to see Minnie suddenly bolt out.
“It all happened in a flash and there was absolutely nothing she could do. But it was sickening.
“Minnie was like another child to Tess and Vernon and to lose a member of the family in such a tragic, hideous way is understandably devastating.”