Social media is now generally accepted by the masses. The adoption of these social media platforms by the stakeholders in senior secondary schools in Ibadan Metropolis was what this study examined. These stakeholders are the school principals, teachers, parents or guardians and the government (Ministry of Education).  The study examined the readiness of stakeholders in the adoption of social media platforms in teaching and learning activities of Senior Secondary Schools. Descriptive survey method was adopted in this study. Five hundred (500) Senior Secondary School teachers and 500 students sampled in Ibadan metropolis from 50 Senior Secondary Schools in Ibadan metropolis.’ Readiness for Adoption of social media Platform for Learning Activities Questionnaire (SRAMPLAQ)(r =0.81) and Teachers’ Readiness for Adoption of social media Platform for Teaching Activities Questionnaire (TRASMPTAQ)                            (r =0.73),respectively were used for data collection. Data were analyzed using descriptive survey tools of frequency table, mean and standard deviation (SD) to answer the research questions. The study found that 90.4% of the students who participated in the research used social media platforms like Facebook, Twitter, Linkedin and WhatsApp and so on, meaning that they are ready to adopt the platform for their learning activities. It was in addition discovered that 85.6% of the teachers who participated in the research are ready to use social media platforms in their teaching and learning activities irrespective of their discipline. The study recommended that there should be proper monitoring of the students in the use of social media platforms by both the teachers and their parents. In addition, the Government should organize seminars and workshops to train teachers on the use of social media platforms like, Facebook, WhatsApp for effective utilization in their teaching activities.