The company, which makes chips and frozen food, will invite agencies to pitch through the London office of Roth Observatory International.
When asked three weeks ago, McCain denied to Campaign that there was a creative review or that it had any plans to hold one.
In a statement this morning, it said it was holding a review "in light of the changing nature of its needs from an agency partner".
BMB will be repitching for the account, which it has held since 2006. The agency’s co-founder Trevor Beattie was instrumental in winning the account when he was chairman of TBWA, and then won the business again after he launched BMB.
McCain Foods’ digital business, which was won by TMW in May, is not affected by the review.
Enquiries about the review should be directed to Lucinda Peniston-Baines, the managing partner at Roth Observatory.