Mindful parenting refers to the parenting skills of being aware, nonjudgmental, and paying intentional attention to both one’s child and own parenting. Until recently, mindful parenting questionnaires were solely based on parents’ reports without a validated assessment tool for children’s reports. This limitation holds significant importance for the field because relying exclusively on parent reports of mindful parenting may potentially overlook important aspects or introduce biases in the assessment. We propose a need to move away from relying on these self-reports and that interpersonal aspects of mindful parenting manifesting in outward behaviors may be observable and thus reportable by others. This chapter provides an overview of the development and evaluation of the psychometric properties of the parallel Mindful Parenting Inventories for Parents (MPIP) and Children (MPIC). Following initial feasibility and structural work, using a sample of UK-based mothers and their children aged 11–16 years, the final inventories comprise 18 items with four subscales: Self-Regulation in Parenting, Acceptance and Compassion Toward Child, Being in the Moment with Child, and Awareness of Child. Psychometric analyses showed that the inventories had good internal reliability and acceptable test-retest reliability over a four-month period in this sample. In addition, the Turkish version of the MPIP/MPIC was cross-validated in an analogous sample of Türkiye-based mothers and their children, supporting the utility of the new inventories in Türkiye. The novel MPIP/MPIC may expand our understanding of mindful parenting and shed light on the unique perspectives of mothers and their children.