Replacing Strings in AS 3.0 with Regex

Here we are replacing a sub String with in a string using a RegEx.

var sampleString:String = "The big bug bit the little beetle, but the little beetle bit the big bug back.";

var pattern:RegExp = /little/gi;
sampleString = sampleString.replace(pattern, "Seattle");
trace(sampleString);

The resultant would be something like this.

The big bug bit the little beetle, but the Seattle beetle bit the big bug back