David Campbell displays unkempt hair and wears a bumbag as he spends his birthday at the park

Today Extra host David Campbell celebrated his 47th birthday on Thursday.

The Channel Nine star spent the special day at a Sydney park with his children, twins Billy and Betty, five.

David donned a casual ensemble and unkempt beard as he walked over to his local park with his kids and the family’s dog Scully.

David wore a pair of blue jeans, a white T-shirt and a dog treat bumbag for the outing with Billy and Betty.

The Today Extra host completed his casual ensemble with a blue jacket, as well as a matching coloured cardigan and sneakers.

At one point, Billy leant over and gave his dad a hug as they watched Betty and the dogs play.

The Channel Nine presenter also kept a close eye on his children as he held Scully’s leash in one hand. 

Billy and Betty were also spotted playing with several other dogs at the park.

David is also father to another son, nine-year-old Leo, whom he shares with his wife of 12 years, Lisa Campbell.  

In an interview with parenting website The Father Hood last year, David said that he aspired to be a role model for his three children.

‘When I became a parent myself, I realised that I needed to be mirroring what I want my kids to be,’ he explained.

‘You obviously want your kids to be Version 2.0 of you. But if the version that you’re putting out there is rubbish, well, then they’re just going to lap you in their teens.’