In honor of the 50th anniversary of Loving v. Virginia (1967), the landmark civil rights case that invalidated laws prohibiting interracial marriage in the United States, this review describes the field's past and future directions for studying interracial romantic relationships. We briefly present history, theories, and research about interracial and interethnic romantic relationships, and provide suggestions for future research. We also highlight the need for flexible racial and ethnic categories as demographics and distinctions shift in the United States by proposing the use of adaptable panethnic (a set of related ethnic groups that have been combined and collectively labeled) categories, rather than racial categories, or the use of more specific ethnic or nationality categories depending on a variety of factors. Finally, we discuss multiracial and multiethnic individuals in the research on romantic relationships, acknowledging that multiracial and multiethnic individuals are both the offspring of such unions and a rapidly growing demographic.