You asked:

is catherine o'hara in the movie the nightmare before christmas

Yes. Catherine O'Hara is in The Nightmare Before Christmas.
Catherine O'Hara
Catherine O'Hara

Catherine Anne O'Hara (born March 4, 1954), the Canadian-American Emmy and Gemini Award-winning actress and comedian

The Nightmare Before Christmas
The Nightmare Before Christmas

Tim Burton's The Nightmare Before Christmas, the animated musical 1993 film produced and written by Tim Burton, directed by Henry Selick and scored by Danny Elfman

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