“American soccer star Becky Sauerbrunn took to Twitter to proudly post a letter from someone she has described as a personal hero and “a complete rock star” — Supreme Court Justice Ruth Bader Ginsburg.

Sauerbrunn had sported a jersey bearing Ginsburg’s name for the SheBelieves Cup on March 2, during which each player honored a different inspirational woman in celebration of Women’s History Month. In Ginsburg’s letter, the justice — whose work defending civil rights has earned her the moniker “the Notorious R.B.G.” — thanked the FIFA World Cup winner for sending her a replica of the jersey and promised that she would be sporting it regularly.

“For the surprise package received today, huge thanks,” Ginsburg wrote. ‘I am proud to be among the women chosen for recognition in the 2019 SheBelieves game against England. The jersey will be my favorite for the biweekly workouts that keep me in shape.’”