Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
It's Always Sunny in Philadelphia』のメインキャストは誰でしょう？

### Response:

テレビ番組「It's Always Sunny in Philadelphia」のメインキャストは、Charlie Day、Rob McElhenney、Glenn Howerton、Kaitlin Olson、Danny DeVito、Mary Elizabeth Ellisです。