An agreement such as this had been in the works for weeks, and Huskies athletic director Scott Woodward, UW coach Steve Sarkisian and the rest of the administration closed the deal Tuesday.
The Huskies have arranged a home-and-home series with Big 10 member Wisconsin starting in 2017.
First game is at Camp Randall Stadium in 2017, followed by the rematch at Husky Stadium a year later. Both games will be season openers.
The UW has won all four previous meetings, including a 44-8 victory over the Badgers in the 1960 Rose Bowl.
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Also, a deal with Hawaii (2013, 2015) and Big Sky member Eastern Washington (2011) were added. The EWU game replaces the originally-scheduled game against Brigham Young
A 2012 date still remains open.