Brian David Sibley is an English writer, known for his prolific contributions to radio drama and documentaries. Born on 14 July 1949, he has authored over 100 hours of radio drama and has written and presented numerous radio documentaries, features, and weekly programmes.

Among his significant works is the 1981 adaptation of The Lord of the Rings for radio, co-written with Michael Bakewell for BBC Radio 4. Sibley is also renowned for his "making of" books on film series such as Harry Potter, The Lord of the Rings, and The Hobbit.

As a broadcaster, he contributed to and later regularly presented arts programmes like Kaleidoscope and Meridian on BBC Radio 4 and the BBC World Service, respectively. He also hosted the Radio 4 film programme Talking Pictures and chaired radio panel games such as Break A Leg and Screen Test.