The cast didn't know what Catherine O'Hara's accent for Moira was going to sound like until the first day of shooting. Catherine O'Hara as Moira Rose. Even O'Hara didn't know exactly where the accent was going to go. She told Vulture in the same article that she initially thought it would die down as Moira adjusted to her new home, but if anything, it got more pronounced. For example, her iconic pronunciation of "bebe" didn't become a running gag until season four.

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Persons: Catherine O'Hara's, Moira, Catherine O'Hara, Moira Rose, Dan, Eugene, Vulture, O'Hara, bebe, didn't