Whiteness in the US is often conceptualized largely as the absence of a meaningful cultural identity. Research from my own lab suggests that overlooking the nuances inherent in White identity (e.g., differences between ethnic groups) can induce feelings of threat and backlash against multiculturalism among dominant group members. Based on this research, I argue that conceptualizing Whiteness as multifaceted—for example, by acknowledging not only interethnic but also religious and socioeconomic differences—may mitigate dominant group members’ threat perceptions and increase their comfort amidst growing discussions of diversity, equity, and inclusion in institutions and organizations. Further, attending to the complexities of White identity may produce more positive intergroup outcomes, such as reduced racial/ethnic prejudice and greater perceived personal contributions to diversity, and may benefit groups that are classified as “White” on demographic forms but often do not perceive themselves as such (e.g., Middle Eastern and North African Americans, Hispanic/Latino[a] Americans).