Spoiled versus Spoilt

The Word Nerd was asked to explain the difference between the spoiled and spoilt (and dreamed/dreamt). Both the “ed” and “t” endings are versions of the passed tense and the words have identical meanings so they can be used interchangably. Using the “t” ending is more popular in Britain which is why those of us in Canada see it more often than our neighbours to the south.  Feel free to use either ending; however, do not mix them in the same sentence or even the same piece you are writing. Pick one ending and stick to it.