This chapter address the stakeholders that should be identified and engaged in the contest process. First, different types of stakeholders are presented along with their characteristics and support to the contest organisers. This is followed by a description of the activity Engage contest stakeholders and a running example. Engaging contest stakeholders is affected by the activity Set goals and itself affects activities such as Motivate developers and Design contest. Often, iterations are made between engaging stakeholders and the process to design the contest, as the structure of the competition is evolving during the pre-contest phase. Finally, we suggest further reading on engaging stakeholders in open digital innovation.