Brill Garrett was born on December 8, 1965, in the state of Illinois. She was a student at Central High School in Hinsdale, Illinois. She graduated from high school in 1984. She went on to attend Princeton University before obtaining a law degree from Harvard University.
Brill Garrett works as a legal counselor by profession. She is a reading advocate and collaborated with Former First Lady Laura Bush to host the 2018 Dallas/Ft Worth Celebration of Reading in Dallas. She was very passionate about her collaboration with Laura Bush, "What a tremendous honor to help continue the work she began, bringing amazing authors to Dallas and inspiring people to embrace reading while supporting local family literacy initiatives. The Celebration of Reading is always powerful, but it takes on special meaning this year with the recent loss of its beloved founder.”
Assets raised from the festival profited more than 140 family education programs and activities all through the nation.
Brill Garrett's husband Jason Garrett is a former head coach of the Dallas Cowboys. He is now the offensive coordinator for the New York Giants. Before becoming a coach, Jason played for the Miami Dolphins and finished his playing career in 2004.
Brill and her significant other met in a class at Princeton University, it was a geography class that occurred three times each week. She said that one day she saw he left lab early, and the following week he left the lab early, and afterward the following week so she was curious about what was happening. She built up the courage to ask him why he was leaving early and he explained to her that he had to for baseball training.
They got married in 1994 during Jason's playing time with the Miami Dolphins. The wedding function was held before loved ones. Although they have been married for over 20 years, they have not had any children yet.
During a World Series match between the Dodgers and the Red Sox, the Garretts went to a ball game in Los Angeles when the Cowboys were struggling with a 3-4 record. Dallas Cowboys fans immediately took wrath to the evident reality that Jason Garrett was investing energy with his better half on a Saturday night instead of focusing on his football team.