It was by her belief and actions she was admitted into the Hall of Faith.

“By faith the prostitute Rahab, because she welcomed the spies, was not killed with those who were disobedient”. Hebrews 11:31

Yes, you heard correctly.  Rahab was a prostitute and a faithful woman.  She testified to God’s greatness, 

“I know that the Lord has given you the land, that the terror of you has fallen on us, and that all the inhabitants of the land are fainthearted because of you. For we have heard  Testimony.  how the Lord dried up the water of the Red Sea for you when you came out of Egypt, and what you did to the two kings of the Amorites who were on the other side of the Jordan, Sihon and Og, whom you utterly destroyed. And as soon as we heard these things, our hearts melted; neither did there remain any more courage in anyone because of you, for the Lord your God, He is God in heaven above and on earth beneath. “ Joshua 2:8-11