Eat your heart out, Lassie!

Masha, a long-haired tabby cat, saved the life of a baby abandoned in the streets of Russia — after she climbed into the box he was discarded in and kept him warm, health officials said.

“The baby had only been outside for a few hours and thanks to Masha … he was not damaged by the experience,” a hospital spokesman told Central European News.

The whiskered hero even meowed to get the attention of a passerby.

“She is very placid and friendly, so when I heard her meowing, I thought that perhaps she had injured herself,” said Obninsk city resident Irina Lavrova. “Normally she would have come and said hello to me. You can imagine my shock when I saw her lying in a box next to a baby.”

Masha is a communal cat who is looked after by local residents. When she found the baby — who appeared to be in great shape — she immediately took to him as if he were her own, according to CEN.

“Clearly her mothering instincts had taken over and she wanted to protect the child,” Lavrova explained. “He was well-dressed with a little hat, and whoever left him here had even left a few nappies and some baby food.”

The baby was immediately rushed to a local hospital, where he was given a checkup and declared fit and healthy, officials said. Since the child was found, Masha has been hailed as a hero by local residents — and she’s been reaping the benefits.

“Everyone in the block is very proud of her,” Lavrova said. “We have all spoiled her rotten by giving her her favorite food.”