Abstract: We present a novel multi-threading programming model for frameworks that combine distributed and mobile objects, and corresponding compile-time and run-time support that realize this model. Key contributions include an automatic thread partitioning scheme that provides the abstraction of logical distributed threads, while permitting arbitrary migration of components which contain parts of the distributed threads in themselves. The distributed mobile multi-threading model is transparent to the application programmer, who uses normal syntax to encode multi-threading applications, but can lower the overhead associated with the model by specifying the migratable components. The multi-threaded model was implemented in FarGo, a Java-based middleware for dynamically-relocatable distributed applications.