'A sad day for comedy:' Saturday Night Live star and comedienne Jan Hooks dies at 57 'after battling serious illness

 Jan Hooks, 57, died in New York City on Thursday

Famous for her 'SNL' impressions of Hillary Clinton, Sinead O'Connor, Betty Ford and Nancy Reagan

Recently appeared on an episode of '30 Rock' as Jenna Maroney's mother

Hooks was famous for her impressions of Hillary Clinton and Sinead O'Connor. 

She also impersonated Betty Ford, Nancy Reagan and Jodie Foster.

She recently appeared on an episode of '30 Rock' as Jenna Maroney's trashy and unreliable mother, Verna. 

Hooks joined 'SNL' alongside Phil Hartman, Dana Carvey and Victoria Jackson