Britt Robertson

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Actors Gregg Sulkin (L) and Brittany Robertson arrive at the 37th Annual Daytime Entertainment Emmy Awards held at the Las Vegas Hilton on June 27, 2010 in Las Vegas, Nevada.

On Friday, March 19th at 11am PT, please join TV.com in a live Q&A chat with Life Unexpected star Britt Robertson! Britt plays main character Lux, a teen who grew up in the foster care system, and who is trying to reconnect with her biological family.

Britt Robertson can’t exactly identify with the foster child she plays on “Life Unexpected,” but she did spend part of her childhood being raised by people who were not her parents. So she can relate.

The oldest of seven children, the 19-year-old petite blonde — who introduces herself as “Brittany” instead of the marquee-friendly “Britt” — left her home in Greenville, South Carolina, for the bright lights of Los Angeles when she 16.

There, she lived with “family friends that we’d met through my grandmother,” she says. “They sort of parented me until I turned 18.”

Still, she says she never faced the uncertain life led by her TV alter-ego, Lux, a 15-year-old foster kid trying to fit into the lives of the birth parents she never knew.

“Lux is an adult at a young age. Moving out to LA, I had that experience. You have to grow up pretty fast, especially being from South Carolina,” Robertson says.

“You have to learn how to relate to adults quicker than you necessarily would, so I have that to pull from.”

Although she’s the youngest member of the cast, Robertson says that she’s babied by her fellow actors, most of whom are a good decade older than she is.