I know her as Megan from the Progressive TV ad or the gal from the latest Milo's Dog Treats TV ad. Melamie is very recognized and memorable by her voice, however she was on Notes from the underbelly and I don't remember her from that! Also found that Melanie has worked with Yoplait and 1-800 Dentist.
So I would say between 8 and 13- depending on the maturity level of your child. In texas there is no law that stipulates when a child is old enough to stay home alone. In fact there was a news story on this just this month (I'm pasting the details for you below.). Good luck!
Most places believe that 12 or 13 is okay to leave home alone for a couple of hours during daylight hours.   Legal Age   There are very few states in the U.S. with legal minimum ages for children home alone, but many state agencies have published guidelines.ypically 8 year olds and over can be left at home for up to several hours (usually after school before a parent gets home from work). 12 years old appears to be the most common recommendation. http://www.latchkey-kids.com/latchkey-kids-age-limits.htm provides a state by state comparison.