This study examined the role of parents' reminiscing style in preschoolers' memory-related functioning and general emotion regulation. In 87 families, each parent rated their child's (Mage = 4.07 years, SD = 0.80) emotion regulation and discussed a positive and a negative memory with their child (resulting in 275 conversations). Multilevel analyses showed that children's rated engagement during the conversation was higher when parents were observed to use autonomy-supportive, elaborative, and positive evaluative reminiscing, while children's rated disaffection was predicted by low autonomy support, low elaboration, and negative evaluation. Parental positive evaluation also related positively to children's memory performance. With respect to emotion regulation, only parents' negative evaluation when talking about negative memories related to higher emotional lability. (PsycInfo Database Record (c) 2020 APA, all rights reserved).