Zachariah Koslow-Schillace
Mark was portrayed by Lauren Koslow's (Ex-Lauren) real-life son.
Here is Zach with real-life Mom, Lauren Koslow (ex-Margo, DAYS' Kate), and sister, Milikate.
{NOTE: This pictures were taking in 1997, when Zach was 8 years old, and Milikate was 6 years old}
