K-1 World Grand Prix 2003 Final was a kickboxing event promoted by the K-1 organization. The event was held at the Tokyo Dome in Tokyo, Japan on Saturday, December 6, 2003 in front of 67,320 spectators. It was the eleventh K-1 World Grand Prix final involving ten of the world's best fighters (two being reservists). The eight finalists had almost all qualified via preliminary events, while two additional fighters were invited as reserve fighters (for more detail on this see bulleted list below), with all bouts being fought under K-1 Rules (100 kg/156-220 lbs).
| Actor | Role |
|---|---|
| FFrancois BothaSelf | Self |
| CCyril AbidiSelf | Self |
| FFrancisco FilhoSelf | Self |
 Stefan LekoSelf | Self |
 Sam GrecoSelf | Self |
 Peter GrahamSelf | Self |
 Bob SappSelf | Self |
 Remy BonjaskySelf | Self |
 Ray SefoSelf | Self |
| CCarter WilliamsSelf | Self |
 Alexey IgnashovSelf | Self |
| MMike BernardoSelf | Self |
 Peter AertsSelf | Self |
| JJerrel VenetiaanSelf | Self |