Unoperated cleft lip leads to disfigured facial esthetics and lack of oral competency that could cause the impairment of speech and psychological status, which affects the quality of life of these patients. The management of completely edentulous elderly patients with cleft lip defect, in whom surgical intervention is not carried out, constitute a significant challenge to the prosthodontist. The role of a prosthodontist in the management of cleft lip patients is pertinent involving restoration, mastication, facial harmony, dental harmony and phonation. Attachment of the maxillofacial prosthesis to the complete denture counterpart is a crucial step in achieving a functional and esthetic rehabilitation of the cleft lip defect. Thus, a novel innovative technique is described for the retention of the maxillofacial lip prosthesis to the maxillary complete denture by using Lego blocks, used as semi precision attachments, which fulfils the prosthetic and functional demands of the patient.