Sun-sign compatibility · two air signs · the same sign
Libra and Libra compatibility
Two Libra Suns are a conjunction by sign: the same element, air, the same modality, cardinal, and the same month of the year. Astrology reads the same sign as the angle of likeness, and the pairing as the one in which two people recognise themselves in each other first.
This year the Sun is in Libra from 23 September to 23 October, so both people were born in the same few weeks of the year, in whatever years. 6 famous couples in StarMap's dataset are two Libra Suns, where chance would give about 4: Catherine Zeta-Jones and Michael Douglas, Marcello Mastroianni and Catherine Deneuve and Carrie Fisher and Paul Simon among them. Among the 537 couples with both Sun signs certain, that makes this the 53rd most common pairing of the 78. A Sun sign is one placement of ten, and the two whole charts say far more than the two signs.
Each sign has its own page: Libra, with its dates to the minute, its traits and the famous people born under it.
What astrology reads for Libra and Libra
Two people with the Sun in the same sign share a way of being seen. Astrology reads the Sun as the part of a person that wants to be recognised, and when two Suns sit in one sign each already understands what the other is asking for: the same kind of praise, the same kind of attention, the same idea of what a good day looks like. The first weeks tend to feel like being understood without explaining.
The tradition is also candid about the cost. What two people share they also compete over, and a pair with the same Sun sign can find that the thing they both want most is the thing there is only one of in the room. The reading is that the sign's strengths are doubled and so are its blind spots, and that the rest of the two charts, the Moons and the rising signs above all, decides whether the likeness feels like company or like a mirror.
Two air signs
Two air signs are read as two people who meet first in conversation. The tradition reads the pairing as light, sociable and full of ideas, with a shared need for room to think and a shared dislike of being pinned down. Astrologers read air pairs as good at talking about the relationship and sometimes slow to feel it, and note that both may look for someone else to bring the warmth.
Two cardinal signs
Both signs are cardinal, the starting signs of their seasons, and the tradition reads two cardinal people as two leaders in one relationship: both want to set the direction, and the question is who goes first on which day. The reading is of a pair that gets a great deal started and has to decide on purpose who finishes.
These are readings of the Sun signs alone, written for reflection and entertainment. They describe tendencies the tradition assigns to an angle, not two people, and they do not say whether a pair lasts.
Libra in love
Libra
In love, Libra is made for partnership and knows it. It is attentive, considerate and romantic, and it can lose itself in the other person while trying to keep the peace. Its lesson is that a relationship with two whole people in it is more balanced than one with one person bending.
517 famous people have the Sun in Libra for certain: every Libra Sun, each with a birth chart.
Famous Libra and Libra couples
Of the 537 spouse and partner pairs in StarMap’s dataset whose Sun signs are both certain, 6 are two Libra Suns. From the share of each sign among every couple’s members, chance alone would give about 4, a ratio of 1.49, which makes this the 53rd most common pairing of the 78. Their sky match, from the angles between the two charts, averages 80 out of 100 against 67 for every couple counted. With about seven couples a cell, a ratio between a half and double is what chance produces; the counts describe the dataset, not the signs.

84Catherine Zeta-Jones and Michael Douglas
Married in 2000

81Marcello Mastroianni and Catherine Deneuve
Listed as partners, 1971 to 1975

76Carrie Fisher and Paul Simon
Married in 1983 · marriage ended in 1984

78Susan Sarandon and Tim Robbins
Listed as partners, 1988 to 2009

86Naomi Watts and Liev Schreiber
Listed as partners, 2005 to 2016

75Ian McShane and Sylvia Kristel
Listed as partners from 1977
All famous couples, each scored from both birth charts.
Both signs in one chart
A chart with the Sun and the Moon both in Libra belongs to someone born near a new Moon in Libra season: the sign's way of being seen and its way of feeling are the same.
Sun in Libra, Moon in Libra: 18 famous people
Only people whose Sun and Moon signs do not depend on an unknown birth time are counted. The Moon in Libra has a page of its own.
Questions people ask
Are two Libra Suns compatible?
By Sun sign alone, astrology reads two Libra Suns as a conjunction: the same element and modality, with the sign's strengths doubled and its blind spots too. That is a reading of one placement of ten and not a verdict on two people. In StarMap's dataset of famous couples, 6 are two Libra Suns, against about 4 that chance would give, a ratio of 1.49. The angles between two whole charts, Moon to Moon and Venus to Mars among them, say more than the Sun signs can; the comparison is free on StarMap.
How many famous couples are two Libra Suns?
6 of the 537 couples in StarMap's dataset with both Sun signs certain, Catherine Zeta-Jones and Michael Douglas, Marcello Mastroianni and Catherine Deneuve and Carrie Fisher and Paul Simon among them. Chance alone would give about 4, which makes it the 53rd most common pairing of the 78. Their sky match, from the angles between the two charts, averages 80 out of 100 against 67 for every couple counted.
Who has the Sun and the Moon both in Libra?
18 people in StarMap's dataset have the Sun in Libra and the Moon in Libra, Doris Lessing, Kate Winslet and Petro Poroshenko among them. The Moon's sign depends on the day and often on the hour of birth, so only people whose Moon sign is certain are counted.
Sun signs are computed from the Sun’s position with the astronomy-engine ephemeris, checked against Swiss Ephemeris, in the tropical zodiac. Birth data and relationship data come from Wikidata; birth times, where StarMap has one, from Astro-Databank with their Rodden rating. A couple is counted only when the Sun was in one sign for the whole of each birth date. Readings describe what the tradition assigns to an angle, for entertainment and self-reflection; StarMap predicts nothing. Compare two whole charts.
Photo credits (15 photos from Wikimedia Commons)
Each link opens the photo’s page on Wikimedia Commons, which states its author and licence.