Former Australian captain Steve Smith has confirmed he has signed a long-term contract with a team in the Big Bash League.

A two-time BBL champion with the Sydney Sixers, Smith will remain at the club on a three-year contract until the end of the BBL|16 season.

While he has signed with the franchise, he is only expected to be available for the run home period of the tournament - a period where he has excelled in previous seasons.

โ€œIt's fantastic news to have Steve commit to the club for the next three years," Sixers General Manager Rachael Haynes said in a statement.

"He's one of the best players in the world and we know just how excited our members and fans will be to see him in pink in the coming seasons.

โ€œSteve is a proven performer in this format and he's in outstanding white-ball form at the moment, leading Washington Freedom to their first title in Major League Cricket last month.

โ€œSteve is a Sixer through and through and has been part of the club since the very beginning.

"It's a sign of significant commitment on his part to sign on with the club for the next three years and we couldn't be happier to have him on board long-term.โ€