We’ve learned she passed away this morning in New York City. Sources tell us Jan had been battling a serious illness.
Jan was part of the ‘SNL’ cast from 1986-91 … the same time as Chris Farley, Mike Myers, Phil Hartman, Dana Carvey and Dennis Miller … and was most famous for being one half of the Sweeney Sisters with Nora Dunn, as well as impressions of Sinead O’Connor and Hillary Clinton.
She most recently played a part on “30 Rock.”
Right after ‘SNL’, Jan joined the cast of “Designing Women.”