|Full Name||Mackenzie Gardner|
|Nickname(s)||Kenzie (by everyone)|
|Date of Birth||1999-2000|
|Relationships||Hayden Warren (boyfriend)|
|School(s)||Lake Munro High School|
|First Episode||Everywhere You Look (2706)|
|Portrayed By||Sabrina Carpenter|
Mackenzie Gardner is a senior (grade 12) at Lake Munro High School.
Starts Lake Munro in season 27, she hangs out with a bad crowd. She befriends Kendall after Kendall comes to her for drugs to cope with her mother. In season 28, she and Kendall hang out more, which angers Kendall's mother. In season 29, after a night of partying and drug use, she wakes up on the other side of town. Although not being seriously hurt, she uses this as a wake up call and tries to get herself back together. Later, after Kendall runs away, she and Kendall's brother Hayden try and look for her. While they are searching they talk and begin to have feelings for each other. They begin dating.
- She has appeared in 21 episodes so far.