Leeds' teenage full-back Jack Walker has committed his future to the Rhinos by signing a new five-year contract.
The 19-year-old England Knights player, widely regarded as one of the hottest prospects in Super League, was already contracted to the end of next season but will now stay at Headingley until at least the end of 2023.
The news is a timely boost for Leeds, who are involved in a relegation battle after winning just five of their first 16 matches of the season.
Rhinos director of rugby Kevin Sinfield said: "Jack is one of the most exciting talents in our game and I am delighted he has committed his long-term future to the Rhinos.
"The club have shown a great deal of faith in Jack throughout his time here and I am confident he can continue to develop and progress in the years ahead.
"We have an exciting crop of young players at the club, both in the first team set-up and in the Academy ranks.
"The average age of the team at the Magic Weekend was just 24 with no player over 30 plus we also have eight members of the England Academy side that beat the Australian Schoolboys last December on our books so the future is bright."
Walker scored a hat trick of tries on his debut in 2017 and became the youngest player to lift the Super League trophy, aged 18 years and 60 days when he helped the Rhinos defeat Castleford in the Grand Final.
Walker, who has fought off competition from Ashton Golding to secure the Leeds number one jersey, said: "We have been chatting about a new deal for a while and I am pleased we have come to an agreement now.
"It is a great club and I am looking forward to the future."