People say that leaders are born, not made. While it is true that some people are born leaders, some leaders are born in the midst of adversity. Often, people who have never had a leadership role will stand up and take the lead when a situation they care about requires it. For example, parenting. When a child arrives, many parents discover leadership abilities they never knew existed until it came time to guide and protect their child(ren).
Once a person learns the techniques of true Leadership and Influence, s/he will be able to build the confidence it takes to take the lead. The more experience s/he has acting as a genuine leader, the easier it will become. It is never easy to take the lead, as one will need to make decisions and face challenges, but it can become natural and very rewarding.