Only if...
It has some speedy way of reaching Earth. Otherwise our monkey butts are safe.
Besides, our biochemistries would not match. We would be poison to it.
And isn't the bit about aliens coming to have us for dinner really old and cliche?
That's a lot of expense and resources to go all the way across the galaxy for
a meal. If it has the means to communicate across space, it can probably
find some closer and easier menu items.