It is possible that:
* The name is misspelled. Double-check the spelling and try searching again.
* The person is not a well-known actor. If she is just starting out, she might not have many credits yet.
* The person is not an actress. The name might belong to someone in a different profession.
If you have any more information about Madelaine Culp, such as her age, roles, or any other details, please provide them so I can assist you further.