In total, there are 111 celebrities in the database whose surname starts with the O. To make it easier for you to find the actor, actress, composer, director, author or other public figure the links to the respective birth horoscopes are split in chunks. They are sorted alphabetically by the first four letters of the surname.
Below links lead to an overview page for the celebrity. From there, you have access to the respective birth horoscope, chinese element analysis, name analysis (numerology) and bio rhythm. You can also match yourself against the celebrity and find out if you would get along from an astrological point of view.
Have a look for yourself.