Gelman is best known for starring in the television series Rags to Riches from 1987 to 1988, where she played the role of Rose. She has also made appearances on a number of other TV shows including CSI: Miami, Providence, The West Wing, Beverly Hills 90210 and Chicago Hope. She appeared in the movie The Hunger Games as Venia, a member of Katniss Everdeen's prep team. Gelman has also acted in various theater productions in the United States. Kimiko is the granddaughter of the American artist Aaron Gelman.