This study tested a 5-year sequential mediation model linking paternal mind-mindedness in toddlerhood to child early academic achievement through a developmental process unfolding in the preschool years. A sample of 128 mostly White middle-class families (68 girls) living in Montreal, Canada was assessed for paternal mind-mindedness when children were 18 months old, child language at age 2, theory of mind and effortful control at age 4, cognitive school readiness in kindergarten, and finally, achievement in math and reading in first grade. Controlling for maternal mind-mindedness assessed at age 12 months, the results showed prospective associations from paternal mind-mindedness to both math and reading achievement, mediated by theory of mind, effortful control, and school readiness in sequence. Results suggest that paternal mind-mindedness may support child academic outcomes by promoting the acquisition of intermediate skills during preschool years.