United Kingdom, April 22 -- Alex Kingston feared she'd made the "the biggest mistake" of her life by joining ER.

The 63-year-old actress shot fame in 1997 when she was cast in the hit medical drama as Dr. Elizabeth Corday and she moved from her native UK to Los Angeles for filming, but Alex has confessed she didn't enjoy living in the US city and it took her a long time to get used to it.

She told The Telegraph newspaper: "I wasn't particularly happy [living in America] to begin with. It was a massive change, and I kept thinking I'd made the biggest mistake of my life.

"I was walking around going: 'Where's the culture in Los Angeles? Where are the historical buildings?' I felt like I was in some sort of giant mall. So it took me a whil...