The paper provides an optimality-theoretic analysis of the prosodic structure and stress patterns in templatic and non-templatic hypocoristics in Hebrew. It is designed to illustrate the emergence of the trochaic foot, whose role elsewhere in the language is rather limited. The trochaic foot has been shown to determine the structure of templatic hypocoristics in various languages; this is also true in Hebrew. In addition, it plays a major role in Hebrew non-templatic hypocoristics, which on the surface look like simple constructions of base+suffix. The trochaic foot does not delimit the number of syllables in non-templatic hypocoristics, but it plays an important role in the stress system, where the position of stress is also sensitive to the input stress and the type of suffix.