The fourth series of The Great British Bake Off ™ began airing on 20 August 2013. Mel Giedroyc and Sue Perkins again presented the show and Mary Berry and Paul Hollywood returned as judges. As with series three, the competition was held at Harptree Court in East Harptree, Somerset.

13,000 amateur bakers applied to appear on the programme, and 100 were selected for screen test, with the best 60 advancing to a three-day audition. From these, 13 contestants were chosen this year so the judges could eliminate two people whenever they wanted.

The winner of the Great British Bake Off 2013 was Frances Quinn.

The fourth series was broadcast as the second season on PBS in the United States where it was called The Great British Baking Show ™