Mary-Kate Burke, portrayed by Mary-Kate Olsen is daughter of Kevin Burke and a mother Jen, who died when she was in the third grade. She is the younger twin sister of Ashley Burke and has a crush on Jeremy. She is the sporty twin and likes to watch action movies. She gets annoyed by her sister's overprotectiveness she doesn't have any girl friends apart from her sister. She loves Carrie very much because she thinks it's like a having a big sister around.