The 25-year old completes the switch having spent the past two weeks training under Uwe Rosler at Elland Road.
It is quite shocking for fans to see that Buckley has failed to make a single first-team appearance this season, despite the fact he managed to accumulate 25 appearances last term.
It is reported that Leeds delayed the move to ensure that his emergency loan, which has had to be limited to a maximum of 93 days in accordance with Football League rules, will run to the start of the January transfer window.
Leeds are then expected to make the deal permanent in January, with a £1 million clause inserted into his loan contract. Buckley revealed that several teams from the Championship were interested in acquiring his services. He said:
“There were a few Championship clubs that got mentioned. I don’t think Sunderland were that keen on me going at first, but they decided that was probably best for me and best for them, too.
However, despite numerous clubs being linked with his signature, the Englishman made it clear on the official club website that his heart was set on Elland Road, talking up Leeds’ history.
“When Leeds came in, that was the club I wanted to go to,” Buckley added. I wanted to go out and get some games at a big club and Leeds was the perfect opportunity for me to do that.”
“It’s a massive club with a good manager. I want to get some games and help this big club get back to where it needs to be.”
Rumours floating around the Transfer Tavern suggest that Buckley could make his full debut on Saturday in a home time against Birmingham.
It was ex-Sunderland manager Gus Poyet, who Buckley also worked alongside at Brighton, who spent £2.5million to bring Buckley to Wearside in August 2014.
Leeds fans, are you excited to see Will Buckley in action for your side? Let us know in the comments!