A reporter told 'The Rock' about Erling Haaland's 6,000-calorie diet, he couldn't believe it

Hollywood actor and former WWE superstar Dwayne 'The Rock' Johnson was left 'stunned' after learning about Erling Haaland's 6,000-calorie diet plan.

Last year, in a documentary titled 'Haaland: The Big Decision', the Manchester City and Norway forward gave viewers a fascinating insight into his every day eating habits.

During the show, a reporter displays a number of meat products, including chunks of cow's heart and liver.

He then asks Haaland if this is what he eats to stay at the very top of his game. "You (other people) don't eat this, but I am concerned with taking care of my body," Haaland said.

"I think eating quality food that is as local as possible is the most important. Or the local cow eating grass right over there? I eat the heart and the liver."

Haaland, who also stresses the importance of looking out at the sun, mentions the circadian rhythm, which is an internal process in the body that regulates the sleeping and waking up pattern.

The 22-year-old former Borussia Dortmund forward went on to explain the complex water filtration system he tends to use.

"The first thing I do in the morning is to get some sunlight in my eyes - it is good for circadian rhythm," he said. "I have also started to filtrate my water a bit. I think it can have great benefits for my body."

Including the cow's heart, liver and his dad's special lasagne, Haaland is said to eat around 6,000 calories per day – a fact that left Dwayne 'The Rock' Johnson stunned.

Johnson, who eats roughly 10 pounds of food every day, was informed of the striker's diet during a recent interview with talkSPORT.

He said: “I do love my food… and if that’s working for him.... he eats hearts and liver and a lasagne before every game, and he’s in amazing shape?!”

In the past, Haaland has said his dad's homemade lasagne is one of the biggest secrets behind his goalscoring form.

The Norwegian is also a fan of the carrot and is often spotted with one in his mouth as he makes his way to City training, with some speculating that he is simply trying to set a good example for younger fans.

On Wednesday night, Haaland broke the Premier League's single-season scoring record when he netted his 35th goal of the season against West Ham. Clearly, the 6,000-calorie diet is going to plan.