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Between one to two-thirds of HIV infections among gay, bisexual, and other men who have sex with men are from primary partners, and there has been increased research attention focused on strategies to increase PrEP adoption among male couples. While there is evidence that partner support is a strong correlate of pre-exposure prophylaxis (PrEP) adoption, there has been a lack of attention on PrEP communication dynamics among male couples. In this paper, we build upon this literature through analysis of dyadic data from a large cross-sectional survey of 543 concordant sero-negative and serodiscordant male couples to examine individual and relationship factors associated with reports of partner communication around PrEP, comfort in discussing PrEP, and perceived partner-level support for PrEP use. PrEP use was relatively low (16.2%), and although 87.5% of men reported their partners would …