CARLTON is poised to secure one of its most exciting youngsters on a long-term deal, with Sam Petrevski-Seton close to signing a contract extension that will tie him to Ikon Park until the end of 2021.

The Blues recruited Petrevski-Seton from WAFL club Claremont with pick No.6 in last year's NAB AFL Draft.

The 19-year-old joined Carlton on the standard two-year draftee contract, but understands he is on the verge of signing a three-year extension. The new deal could be formalised as early as next week.

Petrevski-Seton has made an almost seamless transition into AFL football this season, making an impressive debut in round one against Richmond despite missing the entire JLT Community Series with a quad injury.

Petrevski-Seton has not missed a game since and his performance against Collingwood in round seven – 21 disposals (10 contested), two goals, seven score involvements, three clearances and three tackles – earned him a NAB AFL Rising Star nomination.

The West Australian was also outstanding in the Blues' wins over Essendon (17 possessions and one goal) and Sydney (20 and one), while he has averaged 13.5 possessions and 4.7 tackles a game over the first 10 rounds and kicked five goals.

A silky skilled player with good speed, game sense and composure, Petrevski-Seton shapes as a key component of Carlton's midfield over the next decade.

He told last month he had quickly settled into life at Ikon Park.

"I really wanted to continue my footy in Melbourne because I wanted another challenge in life after four years in Perth," Petrevski-Seton said.

"Carlton is one of the biggest clubs in the system and has a really great history.

"The hardest part has been mental, with the amount of meetings and also to understand things (tactically) to be able to perform on game day."