| Intro | Modern pentathlete |
| Is |
Athlete Modern pentathlete Pentathlete |
| From | South Africa |
| Type | Sports |
| Gender | male |
| Birth |
2 June 1932 |
| Age | 88 years |
| Star sign | Gemini |
Marthinus du Plessis (born 2 June 1932) is a South African modern pentathlete. He competed at the 1956 Summer Olympics.