The rise of technology has brought innovations in the field of marketing. The most modern trend of marketing is termed as social media marketing. Social media is not only reducing the communication distance in the world but the discovery of social media provided opportunities for business to increase their exposure. However, it has been observed that regardless of the advantages of new technology some time users’ are reluctant to accept and use that technology. Considering these facts, the investigation of the factors affecting consumers’ intention for the acceptance and use of social media marketing (SMM) has been the greatest concern of the researcher. Other facet of this study is to understand the nature of consumers’ behavior across culture. This research is an empirical study for testing the underlying factors that influence the users’ intention for the acceptance and use of SMM. Current research proposes SMM acceptance model by integrating unified theory of acceptance and use of technology (UTAUT) and technology acceptance model along with personal constructs. As the focus of this study was on UTAUT, hence majority of factors were selected from this theory. The survey was conducted with sample of 612 participants from South Korea and Pakistan. Findings by using structural equation modeling revealed that attitude towards online advertisement and electronic word of mouth significantly affect users’ intention for acceptance of SMM. Moreover, effort expectancy, facilitating conditions, social influence, perceived usefulness, and perceived risk significantly influence users’ attitude towards advertisement. It has been found that the effect of social influence, perceived usefulness, and involvement is significant on attitude towards electronic word of mouth (eWOM). Moderating effects of nationality, gender, and use frequency are also tested on integrated model. The findings are helpful to understand consumer behavior and advantageous for marketing strategies. This research will contribute to the literature within the domain of social media marketing. The findings along with implications and recommendations for future research were also discussed at the end.