Green, who turned 28 yesterday, signed a four-year, $36 million contract with the Celtics in 2012. His donation is part of $62 million raised for construction of the John R. Thompson Jr. Intercollegiate Athletics Center.
"I'm very fortunate to be in a position to give back to the University and to the program that has done so much for me," Green said. "The environment created by Coach (John) Thompson III and his staff helped shape me both academically and athletically. Georgetown and Georgetown Basketball is at my core and is part of who I am."
The Thompson Athletics Center will have a groundbreaking ceremony on Sept. 12.
The four-story, 144,000-square-foot Thompson Athletics Center will be constructed adjacent to McDonough Arena and include practice courts, team meeting rooms, men's and women's basketball coaches' offices, and weight-training and sports medicine rooms for all varsity athletes. The new facility also includes a Student-Athlete Academic and Leadership Center, an auditorium, team meeting facilities for varsity programs and a new venue for the Georgetown Athletics Hall of Fame.
Green played three seasons for Georgetown and teamed with current Indiana Pacers center Roy Hibbert to lead the Hoyas to the 2007 Final Four.
He averaged 16.9 points and 4.6 rebounds last season for the Celtics.
- Paul Palladino