This research aims to investigate the impact of social media influencer’s credibility dimensions (Trustworthiness, Attractiveness, and Expertise), in shaping consumer's behaviour (Purchasing intention of customers and customer's attitude towards the brand). This proposed theoretical framework is based on social learning theory and the theoretical implications of the previous literature which is related to social media influencer marketing. For this empirical study, the data has been collected from Pakistani consumers who are following social media influencers who share and endorse products related to the fashion industry. Data is collected from 149 individuals out of which 135 were valid respondents. 

Results reveal that social media influencer's credibility dimension (Trustworthiness, Attractiveness, and Expertise) positively influence the customer’s attitude towards the brands as well as the purchase intentions of the customers. In addition, the study has significance for social media influencers in the fashion and style sector in terms of understanding the factors of followers' devotion to them and the noticeable effects of followers' allegiance on their behaviour. This study adds to the literature on social media influencer marketing by demonstrating the importance of follower’s perspective towards the social media influencers. Previous studies lack in providing the Pakistan perspective related to social media influencermarketing and this research attempts to fulfill that gap. Another important aspect of this study is that the pictures of influencers have been used to conduct this research.