Star Carlton rookie Sam Walsh has signed a two-year extension with the club.

Last year's No. 1 pick, Walsh has taken the league by storm over the opening four rounds of the season, averaging 26.2 disposals per game and totalling 20 clearances and 17 inside 50s.

He was awarded with a Rising Star nomination on the weekend for a dominant performance against Gold Coast, tallying 28 disposals, seven clearances and six tackles.

The 18-year old praised the club for being so welcoming.

โ€œThe club has welcomed me with open arms from the moment I got drafted,โ€ Walsh told the club website.

โ€œThe coaches, staff and entire club provide us with everything we need to get the very best out of ourselves, which I have loved. It just motivates you to get better every day.

โ€œWhat struck me straight away was the elite standards our Club has in place, driven by โ€˜Crippaโ€™ and โ€˜Docโ€™. That has us focused as a young group to fast-track our development and achieve success together.โ€