The Serie A side have confirmed the Spain international midfielder has committed his future to the club with a new contract.
Luis Alberto has signed a new Lazio contract, extending his stay with the Serie A side through to 2022.
After moving to the Italian capital in August 2016 to end an unhappy spell in the Premier League with Liverpool, Luis Alberto has thrived.
The 25-year-old midfielder has scored seven goals in the league this season and he won his first Spain cap last November, coming off the bench against Costa Rica.
Luis Alberto has also provided a strong creative threat for Lazio, recording seven top-flight assists this term.
Teaming up with forward Ciro Immobile, Luis Alberto has been key to a Lazio offence that has scored the second-most goals in Serie A this season.
Lazio are currently third in the table, but trail front-running Napoli and Juventus by 14 and 13 points, respectively.
The former Barcelona B player took in loan spells at Sevilla, Malaga and Deportivo La Coruna during his time on the books at Anfield.