Alastair Fothergill (born 10 April 1960 in London the United Kingdom) is a producer of nature documentaries for television and cinema. He is the executive producer of the multi-award winning series The Blue Planet (2001) and Planet Earth (2006) and the co-director of the associated feature films Deep Blue and Earth.

Fothergill attended Harrow. He studied zoology at St Cuthbert's Society in the University of Durham and made his first film, On the Okavango, while still a student. Fothergill joined the BBC Natural History Unit in 1983, working on The Really Wild Show, Wildlife on One and David Attenborough's The Trials of Life. He was appointed head of the Unit in 1992, and during his tenure he produced Attenborough's award-winning series Life in the Freezer.