She said: “One word lines are always harder for me. One word or one little phrase is always more difficult. I think it’s because it has to line up with the button of the joke sometimes.”
Rick and Morty is known for its improvisational tone and natural back-and-forth between its characters, but despite popular belief many sequences are meticulously scripted.
Spencer added: “What happens a lot of the time is I get lines added to episodes more often than I get them taken away.
“And also, storylines change a lot. If a storyline isn’t working, audibly, they’ll go back and re-write and [sometimes] change the whole episode.”