當一顆行星主宰某個星座，而另一顆行星在該星座擢升時，這兩顆行星便互為共同主宰者（co-rulers）。此外，當行星共同主宰某些位置或三分宮（trigons）時，也可以被稱為共同主宰者。
一些具體的例子包括：太陽與火星共同主宰牡羊座，月亮與金星共同主宰金牛座，水星與土星共同主宰雙子座，木星與月亮共同主宰巨蟹座，以及土星與金星共同主宰天秤座。
然而，火星是天蠍座唯一的主宰者。木星與太陽共同主宰射手座，火星與土星共同主宰摩羯座，土星與水星共同主宰水瓶座，而雙魚座則由木星與金星共同主宰。
天界的國王與王后分別是太陽與月亮，它們也被稱為「光體」（lights）或「照明者」（illuminators）。太陽主宰白晝，月亮則主宰黑夜。
派別光體（sect lights）被認為會與其他行星共同主宰，但在這個特定情況下，並不考慮行星的擢升位置。
Two planets are co-rulers to each other, whenever one rules a certain sign, and the other is exalted in that sign. Another instance when planets can be called co-rulers is when they are co-ruling the places or the trigons. Some specific cases are the sun and Mars being co-rulers of Aries, the moon and Venus co-ruling Taurus, Mercury and Saturn co-ruling Gemini, Jupiter and the moon ruling Cancer, or Saturn and Venus ruling Libra. Mars, however, is the only ruler of Scorpio. Jupiter and the sun co-rule Sagittarius, Mars and Saturn both rule Capricorn, Saturn and Mercury rule Aquarius, and Pisces is co-ruled by Jupiter and Venus. The king and queen of the heavens are the sun and the moon, also called the “lights” or the “illuminators”, the sun ruling during the day, and the moon ruling the night. The sect lights are considered to be co-rulers along with other planets, however, the exaltations of the planets are not considered in this specific case.