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April 18, 1982 |
Bethesda, Maryland, U.S.
The daughter of a Navy reservist, Kristina moved four times by age 12. Born in Bethesda, Maryland, she moved to Texas and California before returning to Bethesda. At age 13, she began her acting career by working as an amateur reporter for a local Bethesda UPN station. Her exposure led to some modelling jobs and a part in a re-enactment on America's Most Wanted.
In January 1999, Sisco landed the role of Abigail Williams on CBS's daytime drama As the World Turns. Abigail was the daughter of Holden Snyder and Molly Conlan. She became involved with Chris Hughes, Adam Munson and Nick Scudder. Sisco received two Emmy Award nominations, in 2001 and 2002. Sisco left the show after three years on October 25, 2002, when Abigail left Oakdale to move to Los Angeles with Adam.
In late 1998, Sisco won the Miss Maryland Teen USA 1999 title and prepared to compete in the Miss Teen USA pageant, until she was offered the role on As the World Turns, which was to begin filming the week of the pageant. She was replaced by first runner-up Khosi Roy, who represented Maryland in the nationally televised event and placed second runner-up.
In October 2006, Soap Opera Digest reported that Sisco had been cast in the role of Charity Standish on NBC's daytime drama Passions. The role was previously played by Molly Stanton from July 14, 1999 until Stanton's departure on July 22, 2004. Sisco's first air date was November 15, 2006. 
In 2006, she completed a Bachelor of Arts degree in psychology from Thomas Edison State College and was inducted into the Alpha Sigma Lambda national honor society. Sisco enrolled in the Master of Professional Writing Program at the University of Southern California, graduating in 2008 from the program.