Spencer Karen Grammer (born October 9, 1983)[3] is an American actress best known for her roles as the voice of Summer Smith in the Adult Swim animated science-fiction series Rick and Morty and as Casey Cartwright in the ABC Family college comedy-drama series Greek.

[4] She is the daughter of actor Kelsey Grammer and Doreen Alderman, and was named after her paternal aunt, Karen, who was murdered in 1975.

[3] She has six paternal half-siblings: three half-sisters (the actress Greer Grammer, Mason, and Faith) and three half-brothers (Jude, Gabriel, and James).

[7][8] In 2013, Grammer starred opposite Blair Underwood in Ironside, the remake of the popular 1960s television series of the same name.

[10] Since 2013, Spencer has lent her voice to the character of Summer Smith on the Adult Swim animated science fiction series Rick and Morty.