The Great British Bake Off's 2018 celebrity specials kicked off with just under 4 million viewers last night.
The first of five all star episodes, in support of Stand Up To Cancer, was watched by 3.7 million viewers.
The opening show peaked with 4.2 million viewers, Channel 4 say.
In the first episode, the four brave celebrities ushered into the Bake Off tent were comedian Harry Hill, Spandau Ballet's Martin Kemp, actor and writer Roisin Conaty, and veteran broadcaster Bill Turnbull.
The Great British Bake Off charity specials see a new line up of all star names each week who take part in three challenges before one celeb is crowned Star Baker.
Taking part in Episode 2 next week are are Countdown's Nick Hewer, singer and TV personality Stacey Solomon, The Kaiser Chiefs' Ricky Wilson and dance troupe Diversity's Perri Kiely.
Bake Off ranked second in the 8PM slot, beating What Would Your Kid Do? which had 2.3 million viewers on ITV, but behind BBC One's Holby City with 4.1 million.
Elsewhere, BBC One drama Shetland continued with 4.2 million viewers, down slightly (100,000 viewers) on last week. It bettered ITV in the 9PM hour, 100 Years Younger in 21 Days averaging 2.5 million for its second instalment.