Romantic relationships are normative in adolescence, and parents can play a role in supporting or restricting adolescents' romantic experiences. This study examined parents' involvement in adolescents' romantic relationships in a sample of 226 Mexican-origin families. Findings indicated that, on average, mothers were more supportive of adolescents' romantic relationships than fathers, and parents were more supportive of daughters than of sons. Fathers' (but not mothers') Mexican cultural orientations were associated with greater restrictions on adolescents' romantic relationships. For mothers of boys, higher levels of familism values were linked to lower levels of support, and for fathers of boys, more traditional gender role attitudes were associated with less support. Also, more parent-youth conflict was associated with greater support from mothers but greater restrictions from both mothers and fathers. Finally, less granted autonomy in early adolescence was associated with greater parental restrictions. Discussion focuses on the nature of mothers' and fathers' involvement in adolescents' romantic relationships. Implications for research and practice highlight the importance of recognizing cultural and relational factors that shape mothers' and fathers' parenting around adolescent dating.