Translation of "pilvakalbys" into English

Iš tiesų tai daro aktorius — pilvakalbys, kuris atsargiai, stengdamasis nepakrutinti lūpų, kalba lėlės „balsu“.

Of course, it is actually the performer—a ventriloquist—who is producing the doll’s “voice,” ever careful not to move his own lips while doing so.