It wasn't even close between the two reality talent shows, with BGT on ITV almost 3 million viewers ahead.
But The Voice held up well despite the clash, with an average audience e of 6.67 million viewers, actually slightly up on last weekend.
However it's peak audience was down from over 8 million to 7.7 million.
The opening episode of Britain's Got Talent 2013 auditions on the other hand attracted a huge audience of 9.35 million viewers from 7PM to 8:30PM.
The bumper show peaked with a huge 11.4 million viewers as the first batch of wacky and talented wannabes went before judges Simon Cowell, Alesha Dixon, Amanda Holden and David Walliams.
Including viewers on ITV+1, more than 10.6 million watched BGT last night, with a peak of more than 13 million viewers, more than The X Factor final achieved last year.
And in better news for ITV, the show was up 6% on last year's launch, while The Voice was down 29% on last year's equivalent episode, despite scoring a series high.
Both shows continue next Saturday night, but won't clash after BBC bosses moved The Voice to a later time slot of 8:20PM.
Browse our gallery of the first episode below: