An English dad claims his pet Burmese python has grown into the world’s biggest, but is still welcome to live in his home — alongside his much smaller children.

Marcus Hobbs, 31, bought Hexxie from a pet shop eight years ago when the reptile was just 8 inches long. The constrictor is now over 18 feet, Hobbs claims.

“I knew she would be big but she has shocked everybody by how much she has grown,” Hobbs, an IT worker from Tewkesbury, Gloucestershire, told South West News Service.

The potentially lethal reptile, who is still growing, chows down on rabbits, stillborn deer, calves, goats and pigs — and poops enough to fill a large trash bag once a month, according to the news agency.

Experts say the biggest Burmese python was 18 feet, 8 inches long, but Hobbs claims Hexxie is even bigger.

“I am very passionate about snakes and I try to help people understand them,” Hobbs said, adding, “I think people are so scared of them because they think they are going to kill them, but if people come around, I can talk to them all day long about snakes to reassure them.”

Hexxie lives in the three-bedroom home with his partner, Amy, 31, their two young sons, a smaller snake named Monty and Shiloh, the family Husky.

Hobbs says he would not bring Hexxie, who lives in the living room, out when his sons, ages 1 and 4, are around.

“I would only do it while they were in bed or another room,” he said. “I don’t think she’d be dangerous towards them, but you have to use your common sense and I’m a responsible pet owner.”

He said the closest Hexxie has ever come to attacking him was when he had to apply iodine to a skin infection.

“She went for me. Not properly — more of a ‘back off, get away’ type of thing. She’s nipped but she’s never latched on,” said Hobbs.

“Her mouth is full of hundreds of pin-shaped teeth like fishhooks,” Hobbs said. “If she gets hold of you, you cannot pull your hand out because all the teeth are going the wrong way.”