Leak on Headliner

Well this is my first post, and I wish it was on a more positive note. I've got about 2600 miles on my 2013 Cruze LTZ, just bought it last month (yes, I have a very long commute). I really do like the car, but it's certainly had a few quirks since I bought it. Nothing major, but a few items I wouldn't expect in a brand new car -- I won't get into those though, it's just me being picky. So anyway, I get in my car to go home tonight (we have a lot of rain bearing down on New England right now) and I sit down in the driver seat and feel a piece of water in my leg as I'm starting the car. I look up at the ceiling and good lord, there's water on my headliner. Now it's important to know, I HAVE NOT USED MY SUNROOF SINCE BUYING THE CAR. So where on earth did this leak come from? It's not like it's the first time it's rained since I bought the car. See picture below. Anyone else had this problem or something similar? Thanks in advance.