[mass55th]

"For some reason it’s easy for British actors/actresses to do a believable Southern accent."

They do have a knack for that.

Not sure if you ever watched the tv series "Fringe," but Anna Torv, one of the main stars is Australian. I never would have known had I not done a search for her on IMDb.

[laplata]

The Brits have a knack for good Southern accents because Southern accents evolved from British accents.