Otto Sandilands is 1 and already a millionaire. It's not because of his dad.

Otto Sandilands has enough money to buy his first home, and he hasn't even started school yet.

As the son of radio host and media personality Kyle Sandilands, it would be easy to assume that his wealth comes from his father, who is rumoured to be on a five-year $20 million contract for his KIIS radio show Kyle and Jackie O. 

However, it turns out the money doesn't come from his dad at all. 

Watch: Kyle Sandilands on relationships and kids. Post continues after video. 

Listeners who tuned into Sandilands' radio show on a few weeks back might have heard the details about his own spending habits, but what made people really lean in was when he talked about his son. 

When Jackie O heard about her co-host's extravagant spending, she joked that her godson, Otto, might not get an inheritance. 

She was immediately rebuffed by Sandilands who made it clear his son has an inheritance – but not thanks to him.

"Otto's already been loaded up by his great-grandfather, so no worries for him," he said.

"He's wealthy. My child’s a millionaire, he’s already got a million dollars in his bank," the radio host added. "I'm jealous of my own kid."

Kyle Sandilands and his son, Otto. Image: Instagram @kyleandjackieo.

Earlier this year, the family made headlines after celebrating Otto's first birthday with a jungle-themed party which cost Sandilands and his wife Tegan Kynaston approximately $25,000. 

"It's a watered-down type of party," Sandilands said on Kyle and Jackie O following the celebrations.

Read more: 'It's a watered-down type of party.' Inside Otto Sandilands' $25,000 first birthday.

Feature Image: Instagram @kyleandjackieo.

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