Is it possible to be very ugly in the childhood but then be pretty as a grown-up?

Or, at least I was told I was ugly by a lot of people my age when I was in 1-3 grade, but adults told me I was pretty. They stopped calling me ugly in 4th grade I think, and is there a chance that I got prettier? There are no signs of me being pretty right now (nobody hits on me and such), but still.