10 Guest Stars We Want To See It's Always Sunny In Philadelphia

10. Will Arnett

If you're not familiar with Will Arnett, then you've probably missed some of the best television shows of the past decade.

This comedy actor with an iconic deep voice and dry sense of humour has made his name in projects like Arrested Development, The Lego Movie, Teenage Mutant Ninja Turtles and Bojack Horseman. Naturally, he's made a big impression in each of them.

Part of what makes Arnett so appropriate for Always Sunny is his typecast. Typically, this actor always plays douchebags, as his arrogant demeanour, dark humour and gruff voice paint him like someone who thinks too highly of himself, and there's plenty of ways Always Sunny could use that.

Arnett could go down many avenues, with some of the best being giving him a position of power. For example, the Bojack Horseman star could easily play a lawyer (possibly taking over for the regular lawyer) or a business owner working alongside Paddy's.

Whatever position he ended up being put in would be great, as his distinctly rude/abrasive comedy would paint him in the right light.