Brandon Starcevich completes a huge week in his young life after extending his contract with Brisbane.

Starcevich added two years to his existing deal and will be at the Lions until at least the end of 2021.

It comes on the back of the 19-year-old making his debut against North Melbourne where he had nine disposals and laid five tackles in Brisbane's three-point loss.

"It's been filled with nerves, anxiety and a bit of excitement. It's been unreal, probably one of the best weeks of my life to be honest," Starcevich said.

"I was happy here, it was just a decision of whether I wanted to stay here for another two years. In the end it was an easy decision."