|Full Name||Haley Tirpack|
|Nickname(s)||Mrs. Tirpack (by her students)|
|Date of Birth||1976|
|Family||Dave Tirpack (son)|
|Relationships|| Michael Tirpack (husband)|
Dan Matthews (ex-boyfriend)
|School(s)||Lake Munro High School|
|First Episode||Long Live (2) (1207)|
|Portrayed By||Reese Witherspoon|
Haley Tirpack (nee Smith) is an English teacher at Lake Munro High School. She is the mother of Dave Tirpack.
She is the new teacher in season 12. She almost gets herself fired after she was seen with other students but they backed her up and no files were charged although she did get suspended for a week. In season 13 her son Dave comes to the school after the middle school burns down. In season 19 her job is in jepoardy, although she is able to keep her job. She is angry at Mrs. Nelson, for bullying her son, when he did nothing wrong. In season 21, she goes to pick up her son's girlfriend and Bianca at a party. Later, Olivia and Peter confide in her, when Peter tells of his sexual abuse. She takes them to the police station, and the police arrest the coach. In season 22, she learns that Erin is being harrased and gets the teacher fired. Later, she has to go to the police station to get her son after he gets into a fight. She is mad at first, but after learning that it was to protect Cam, she becomes less mad. She later goes on a weekend trip with Maddie and Dave. In season 23, Dave confronts her upon a discovery he made about his father. She confesses that she was in a relationship with a married man although she didn't know it at the time. When she found out, she ended it but she was already pregnant with Dave. Her new boyfriend, and later husband agreed to raise Dave as his own, and even gave Dave his last name. In season 24, she is the one to call Brad Park's parents at the prom. In season 26, she is seen at her son's graduation. In season 28, she is the one who Ben tells about Nick and Melanie and she gets Principal Baker involved. In season 29, attends the staff meeting where she finds out that Lake Munro will be closing at the end of the 2018-2019 school year.
- She has appeared in 190 episodes so far.
- She is currently the longest returning regular character being a regular for 18 seasons. (12-29)
- Despite being a regular in season 25 she only appeared in 1 episode.