11. The method of claim 1 , comprising: determining, by the first computing device, one or more speaker models that are each stored on the first computing device and for a person other than a user of the first computing device, wherein determining to remain in the locked state and not respond to the voice command comprises determining, by the first computing device, to remain in the locked state and not respond to the voice command despite receiving the audio data that corresponds to the utterance of the voice command that is preceded by the particular, predefined hotword using the one or more speaker models that are each stored on the first computing device and for a person other than the user of the first computing device.
12. The method of claim 11 , comprising: obtaining, by the first computing device, user input identifying data for the one or more speaker models that are each stored on the first computing device and for a person other than a user of the first computing device.