Star of The Big Bang Theory, Johnny Galecki, has suffered a major loss this morning after his LA ranch burned to the ground.

TMZ has reported that Johnny's ranch in San Luis Obispo was engulfed by huge flames, which couldn't be prevented.

The publication also reports that the surrounding property was also torched in the fire, which spread across 1,200 acres of land.

According to CNN, the actor has not been on the property since the fire, and has said that he'll be back to collect and salvage memorabilia once the fire services give the all-clear.

It is believed the blaze started as a hill fire that spread across the outskirts of LA.

The TV star said in a statement: "My heart goes out to all in the area who are also experiencing loss from this vicious fire.

"The threat of which we live with constantly, which may seem crazy to some but we do so because living in our beautiful, rural area makes it worthwhile.

"It's never the structures that create a community — it's the people.

"And if the people of Santa Margarita have taught me anything it's that, once the smoke has cleared, literally and figuratively, it's a time to reach out and rebuild.

"We've done it before and we'll need to do it together again. And it will make our community even closer and stronger."

Johnny added that he is relieved nobody was hurt.