Online exchange of sexual content ("sexting") is associated with potentially negative consequences, especially for girls. We investigated possible associations between family functioning and girls' sexting. Italian teenage girls (N = 250; M[subscript age] = 16.36 years; SD[subscript age] = 1.88) completed online surveys that evaluated family functioning (communication, flexibility, cohesion, disengagement, chaos, enmeshment, and rigidity) and five sexting behaviors: (a) engaging in sexting, (b) sexting with a partner, (c) number of people with whom girls share sexts, (d) nonconsensual forwarding of sexts, and (e) sexting for emotion regulation. We found that engaging in sexting, sexting for emotion regulation, and the number of people with whom girls share sexts were predicted by age and low family communication. Sexting with a partner was predicted by age and high flexibility, and nonconsensual forwarding of sexts was positively predicted by enmeshment.