The fastest missile in the word is the Russian Kinzhal (KH-47M2)

 The fastest missile in the world is the **Russian Kinzhal (Kh-47M2)** hypersonic missile. It is reported to reach speeds of up to **Mach 10** (about **7,672 miles per hour** or **12,350 kilometers per hour**). The Kinzhal is an air-launched ballistic missile capable of carrying both conventional and nuclear warheads, designed for high-speed precision strikes.

Other notable mentions in the category of fast missiles include:

1. **BrahMos-II**: A hypersonic cruise missile developed jointly by India and Russia, which is expected to reach speeds of **Mach 7**.

2. **DF-ZF**: A Chinese hypersonic glide vehicle that reportedly can reach speeds of **Mach 5-10**.

Hypersonic missiles are considered game-changers due to their speed, maneuverability, and ability to evade modern missile defense systems.