WILL I DISCOVER THAT I WAS SOMEONE FAMOUS IN A PAST LIFE?

Probably not. Contrary to reports that people being regressed all remember being someone like Cleopatra or Napolean, that is actually very rare and highly unlikely during a past-life regression!
Most of us discover that overall we had very simple lives. It is not uncommon for people to remember being peasants, sailors, maids, members of tribes, slaves, farmers, etc. Sometimes these lives were colorful and eventful, but more often people find there were only one or two significant events or decisions which contributed to the present-day patterns.