Hey everyone!

A couple of nights ago when I started the car, the headlights started to flicker and the battery light came on the instrument cluster.
I drove around for a while but it got progressively worse, meaning the ABS light came on, then the BAS light and eventually the spoiler button light started blinking and at the end of the ride the spoiler popped up out of nowhere.
Now, I know our cars are very sensitive to low power and those things are perfect indicators for not enough "juice" flowing but how do I figure out what the culprit is most likely?
Could it be the battery or are you guys more so pointing towards the alternator? Is this a known problem with our cars?
Any help would be appreciated. Obviously I won't be driving the car to work tomorrow morning as I don't want to be stranded on the side of the road. Got a feeling the battery is draining quick!

Thanks for all your help and have a nice night,

Nick