Katherine comes from a very large family that spans from the Alajuelan countryside of Costa Rica to the exotic Caribbean flavours of the Eastern province of "Limon". While her family is big, they are very close and many live within the same area of what has been known as the world's best site for year-round weather, in Costa Rica. Katherine's younger sister, Brenda Kellerman, is also in the entertainment business. Katherine has two brothers: John and Jefferson. Katherine's family, in particular her mother, has always supported her dreams and Katherine worked in modeling and events all over Costa Rica while growing up. Katherine continuously made efforts to gain more exposure and seize every opportunity to get to "the big screen," and finally made it to work with Televisa in Mexico, which was a great honour. Faith, a genuine love for the arts, and a deep appreciation for friends and family have always been very important to Katherine.