Veteran defender Alex Silvagni, will play on in 2018, after signing a one-year contract extension with Carlton.

Silvagni was recruited by the Blues in last year's rookie draft after being delisted by Fremantle following 53 games in seven seasons at the club.

He played seven games in his first year as a Blue, before injury cut his season short in Round 12, after an impressive start the year.

The 29-year-old said he was delighted to earn a contract extension and feels energised since joining the club at the end of last year.

"This whole 12 months has been fantastic and invigorating for me," he said.

"Being around such a young group in a different environment is like starting my AFL career again.

"I need to show my strengths, which is the physical side of the game [and] lead through my actions on the field and show what the minimum standards are for AFL football.

"My real strengths are that brutality and hard edge.

"If I can bring a few kids along with me in that area I feel like I have done my job."