Sussex captain and wicketkeeper-batsman Ben Brown has signed a new deal.
The 29-year-old, who was appointed as skipper for the County Championship and One-Day Cup sides in March, was due to be out of contract at the end of the 2018 season.
He is Sussex’s leading run-scorer in this season’s Championship, scoring 346 runs at an average of 49.42.
Brown said he felt the club is making good progress and he is relishing the challenges “as a captain and a player”.
“It’s my ambition to win trophies with my home club and I hope we’ll be able to realise this ambition in the near future,” he told the club website.
The length of the contract has not been revealed.