2 month old sleeping through the night, is it okay?

My daughter is 2 months old and through out the day she eats 3-4 ounces every three hours. Once bed time comes and we put her in her binet she usually sleeps through the night missing 1-2 feedings, is this okay? I mean she is gaining weight, she currently weighs 11 lbs 6 oz and is 23 inches long. I ume that if she is hungry she would wake up and let us know, when she was a newborn she did. Should I wake her up for at least one feeding during the night or should I be grateful she gets her sleep through the night.