Susan Saint James (b. 1946) is an actress most well known as Kate McArdle on the 1980s sitcom Kate & Allie, which also starred Jane Curtin, Ari Meyers, and Allison Smith. She has also appeared in episodes of M*A*S*H, The Drew Carey Show, Law & Order: Special Victims Unit and hosted Saturday Night Live.
She appeared on Sesame Street in season 20 at a Grouchketeer meeting. Oscar says she can't be one of them because she's too big, and compares her to one of the regular Grouchketeers. When Snuffy shows up late and lets Susan borrow his lid, Oscar doesn't approve, so he ends the meeting. (EKA: Episode 2977)