Sometimes the best way to get a dramatic performance is to cast funny people.
The basic set up is that Wiig and Hader are estranged siblings who are reunited after a tragedy and all kinds of family drama ensues. This looks a lot like a lot of other indie dramas (family drmam! dancing! jokes during sad times!) but it was very well reviewed at Sundance, particularly well received were the performances by Wiig and Hader, so this is one is likely something to look forward to.
The Skeleton Twins is being released 19th September in the US. Hopefully the same day in Canada.