Kotlin Multiplatform is a wonderful framework for sharing code, but not all code in the world is written in Kotlin. Rust is an increasingly popular language for writing low-level logic in a way that is memory-safe and performant. What if we put these two together? This talk will cover the mechanics of communicating between Rust and Kotlin in a multiplatform environment. We'll explore how declarations in one language can be made visible to the other, look at ways these bindings can differ on different platforms, and examine how we can configure a build that wires it all together. Code that talks to other languages can have very different structure and needs compared to what you might be used to writing in a pure Kotlin project. By the time we're done, you'll have the tools you need to start writing that code.