Kallie Flynn Childress is an American actress. She is best known for her role as Yancy in the 2004 film Sleepover, for which she won a Young Artist Award for Best Performance in a Feature Film - Supporting Young Actress at the 2005 ceremony.
The only Kallie/Callie I know spells her name Kallie, and is named Kalmia. The c just looks weird, and I honestly think it's weird for Callie to be short for any other name. I wish Kalmia was more common, with this as a nickname.