FIRST-YEAR midfielder Brandon Starcevich has completed a huge week in his young life, 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 last Saturday where he had nine disposals and laid five tackles in Brisbane's three-point loss. 

Starcevich has been selected in the team to play Collingwood at Etihad Stadium on Saturday night.

"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 [to extend contract]." 

It's been a strong first season for the West Australian, who was taken by the Lions with pick 18 in last year's NAB AFL Draft. 

Recruited as a strong midfielder that could also play half-forward, Starcevich has improved his form through the NEAFL and had a strong six-week patch before his senior call-up.

The nephew of Brisbane's AFLW coach Craig Starcevich, the quietly spoken teen loves the contested side of the game and has worked hard on spreading between contests.

Brisbane has now locked away all of its first-round picks from last year until 2021, following the extensions by Cam Rayner and Zac Bailey earlier in the year.