Cohain marriage to Ba’al Teshuva

You have noted that a Cohanim who did not know that his wife had pre-marital relations with a non Jew until the marriage does not have to divorce her. However, if a Ba’al Teshuva woman who has had relations but not marriage with a non Jew reveals this before the marriage, will the Cohan be prohibited from marrying her?

In that case - he will be prohibited to marry her.