Nigel Marven (born 27 November 1960) is a British wildlife TV presenter, television producer, author and birdwatcher. He ran the 2008 London marathon in 4 hours 4 minutes to try to raise £20,000 for the Whale and Dolphin Conservation Society UK.
Marven was born in Barnet but grew up in St. Albans. As a child he loved animals. His first pet was a hamster called Hummy. He kept stick insects, boa constrictors and even an eel in a bath. When he was 15, he got young spectacled caiman too. He studied botany at Bristol University until the age of 22 when he left to begin his career at the BBC Natural History Unit in Bristol. Over the following years he worked firstly as a wildlife documentary researcher for such programmes as The First Eden and My Family and Other Animals, then went on to produce such series as Realms of the Russian Bear. He enjoyed a 12-year professional collaboration with David Attenborough whom he holds in high esteem. In 1998, he moved to ITV where he was asked to present wildlife documentaries as well as producing them.