Cheaper by the dozen is a title .
`` Cheaper by the Dozen '' is a technique used to make the 2003 American family comedy adaptation of an autobiographical book by Frank B. Gilbreth , Jr. and Ernestine Gilbreth Carey , but despite the concept of a family with twelve children , ranging from 5-year-old Nigel & Kyle to 22-year-old Nora , the film bears no resemblance to the book nor its original film adaptation , although it is mentioned that the mother 's maiden name is Gilbreth .
Cheaper by the Dozen -LRB-2003 film-RRB-