By Erin Strecker
Updated November 22, 2013 at 08:50 PM EST

Comedy fans probably know Alex Borstein as the voice of Lois on Family Guy, or from her stint on MADtv. But this Sunday marks a new turn for the actress: She’ll star in the scripted HBO comedy series Getting On, about a group of nurses in an elderly care facility. Based on the British hit of the same name, the show also stars Laurie Metcalf and Niecy Nash.

“Tonally, it’s tricky,” Borstein explained about the show. “You’re laughing one moment and tearing up at the next. It’s this full, rich world of caring for people who are dying. There was no question once I saw a clip from the original British series [I wanted to be involved]…It’s bittersweet. It’s got that British humor that’s very harsh but then there is also that hidden pathos.”

When Borstein came to EW to take her Pop Culture Personality Test, she was prepared. Besides gushing about a long-held crush on Johnny Carson, she was also excited to spill all about a movie she saw way too young. What was it? Watch below.

Getting On premieres on HBO this Sunday at 10:00 p.m. ET.