Marilyn Chinwenwa Okoro (born 23 September 1984, in London) is a British track and field athlete.

[5] She speaks four languages (English, French, Spanish and Igbo)[6] and sings in the jazz band The Felonius Monks.

[7] Marilyn suffered an injury plagued 2009 outdoor season, though she battled through the pain barrier to finish a very credible 8th in the World Championships 800 m final in Berlin.

Marilyn had a limited race schedule in 2010, but returned to a degree of form when taking bronze at the UK championships.

Subsequently, Okoro was selected to challenge for a medal in the 800 m alongside Jenny Meadows and Jemma Simpson at the 2010 European Championships in Barcelona.