Rhinos are understood to have handed over separate six-figure fees for the pair in their biggest transfer coup for more than a quarter of a century.
Here’s the Yorkshire Evening Post’s choice of Leeds’ 20 highest-profile signings from fellow Super League clubs since the competition began in 1996.
1. Ryan Sheridan (debut 1997)
Signing the scrum-half from his old club Sheffield Eagles was one of new chief executive Gary Hetherington's first priorities after joining Leeds. Photo: Mark Bickerdike
2. Iestyn Harris (1997)
Rhinos’ first big signing of the summer era. Leeds paid Warrington a six-figure fee and Harris was worth every penny. Photo: Mark Bickerdike
3. Daryl Powell (1997)
The Great Britain star was the biggest name among nine players signed from cash-strapped Keighley Cougars for a total fee of £25,000. He enjoyed a fine swansong to his playing career with Leeds before becoming head-coach. Photo: Mark Bickerdike
4. Keith Senior (1999)
Senior was a hot property when Rhinos splashed out to sign him from Sheffield Eagles late in the 1999 season. He went on to win four Grand Finals and become one of the club’s all-time greats. Photo: Mark Bickerdike
5. Willie Poching (2002)
The New Zealand-born second-rower was captain of Wakefield Trinity Wildcats before being snapped up by Leeds. He was a key member of their 2004 Grand Final-winning side. Photo: Dan Oxtoby
6. Gareth Ellis (2005)
Another second-rower, Ellis followed Poching from Wakefield to Leeds three years later. A World Club Challenge winner in his first game, he played in the 2007-8 Grand Final wins before moving to the NRL. Photo: Gary Longbottom