Anxiety disorders (AD) are the most prevalent psychiatric condition in the general population worldwide, and it is estimated that between 6.57 and 13.54% of new fathers suffer from an AD (Leiferman et al., 2021), a considerably higher proportion than the prevalence for anxiety in men generally estimated by the World Health Organization (World Health Organization, 2017; range between 2.2 − 3.8%). The mental health of children is robustly associated with the mental health of their parents (Jami et al., 2021). In particular, children whose parents suffer from ADs, compared to children whose parents do not, have a higher risk of struggling with their mental health (e.g., Connell & Goodman, 2002; Micco et al., 2009; Lawrence et al., 2019). However, the specific role played by fathers in children's mental health difficulties has been under-investigated, and the particular risk posed by paternal anxiety for offspring mental health difficulties is not well understood.