Robert's twin

Saying that Robert Irwin and Steve Irwin look similar won't come as a surprise to anyone - they're father and son after all.

But have you ever noticed how similar they actually look? 

After an interview with the Irwins on The Sunday Project, Lisa Wilkinson shared a snap of the father and son duo side-by-side at the same age - and fans can't believe their eyes.

She captioned the uncanny snap: "That's Robert on the left and his dad Steve around the same age on the right," Wilkinson wrote in the caption. "Amazing."

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Fans flooded the comment section of the post, blown away by the similarities. 

One said: "I swore I was looking at two photos of Robert!"

During the interview, Robert revealed that he still has a strong connection to his father, despite Steve's death back in 2006.

"I feel closest to Dad when I'm working with the animals that he really loved," he said.

Robert makes a lot of TV appearances, mostly in the US, to try and keep his dad's conservation dreams alive.

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He has appeared on The Tonight Show Starring Jimmy Fallon several times over the past two years, terrifying Jimmy and his guests every time.