Voice Over Voices on AppleWatch

Is it possible to use another American voice for Voice Over on the AppleWatch, other than Samantha?

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#1 Alternative Voices

Currently, I do not believe it is possible to have other voices on the watch. As for version 6 coming out this fall, it may be possible. I suspect it will be another series 4 watch only feature though.

#2 Surprised no fred

Surprised Fred wouldn't be on the watch, not a very resource intensive voice so it would seem possible.