Wheaties 'Breakfast of Champions' ad with Ken Keltner's family, Ladies' Home Journal August 1949
The pattern
This still is filed under Celebrity endorsement.
Define
A named, recognizable person lends their reputation to the claim. The name is the proof.
Mechanism
Transferred authority. The reader believes the person first, the product second. Fame or office does the work a peer testimonial does not.
Verdict
The endorser is actually known to the buyer
Why it works
The endorsement is displaced from the athlete to his family, which is the whole trick: the reader is not being asked to believe a paid star likes cereal, she is being shown that the champion's household feeds it to ordinary children at an ordinary kitchen table. That makes the target of the proof the mother's decision rather than the boy's admiration. The headline turns a product into a timeline, so buying the cereal is buying an early start, which reframes a breakfast purchase as an investment in the child. The nutrition list is kept until after the social proof has landed, giving the mother a rational defence for a decision the photographs already made.
Steal this when
Use this when you have access to an authority figure's household rather than the authority himself, and the buyer is a parent deciding on behalf of a child. The structure also fits any product where the real sale is a head start, so the headline should promise the timeline and the body should supply the permission to believe.