Robert Irwin is the son of the Crocodile Hunter, Steve Irwin.

Steve passed away in 2006, but his birthday would have been on February 22.

“Happy birthday Dad,” Robert began an Instagram tribute.

“I love you and I miss you more every single day,” he continued.

“My earliest memories are my fondest, thanks to you,” he added.

He said he used to love taking morning trips around the zoo on his motorbike.

He revealed that Steve would sometimes treat him and his sister Bindi to ice cream for breakfast.

“Every minute spent with you was a blessing,” he added.

Robert said he would ride that lap this afternoon in memory of his late father.