The Baftas attracted an audience of only 3.5 million viewers on Sunday night, amid criticism of the decision to broadcast the film awards on a time delay and poor reviews for the host, Joanna Lumley.
The figures come at a time of substantial decline in live TV viewing, as the public switch in substantial numbers to Netflix, Amazon and YouTube.
ITV appeared to benefit, attracting 5 million viewers to a new episode of the Inspector Morse spin-off series Endeavour during the same time slot as the Baftas.
Lumley, who returned for a second stint as host, received largely negative reviews after a series of attempted jokes fell flat.