Three trines to Mars, and almost nothing else on the board.
Light contact
Low in the range for contact across 93 pairs charted (29–86, median 41).
Austin Butler and Kaia Gerber compatibility
↓ Below: all 3 aspects named, with orbs
Verified by a birth certificate or official record: full chart shown, including houses and the rising sign.
Note on this rating: Birth data via astrotheme.com (Austin_Butler), Rodden AA, birth certificate or birth record. Credits Lois Rodden / Astro-Databank. Nominated Best Actor at the 95th Academy Awards (2023) for Elvis.
This page compares Sun, Mercury, Venus and Mars, the four placements a birth date alone can place. Moon, Ascendant and Midheaven are left out here by design, not by omission, so nothing on this page is scored against a birth time it cannot trust.
Cross-aspects
Where the two charts actually touch
Category shape
Five categories, one chart each
Attraction
VENUS × MARS
live spark, from Austin Butler's Venus trine Kaia Gerber's Mars
30
Identity
SUN × SUN
No aspect inside orb. Their core identities read independently of each other here.
None
Communication
MERCURY × MERCURY
No aspect inside orb. This engine finds no direct communication channel between them.
None
Friction
MARS × MARS
No aspect inside orb. No built-in friction point shows up between the two Mars placements.
None
Values
VENUS × VENUS
No aspect inside orb. Their values neither align nor clash by this measure.
None
Scores rank how close a contact is to exact, not how well two people get along. A high friction score means the two Mars are in tight aspect, which is information, not a warning.
The overlap
Two charts, laid over each other
Austin Butler and Kaia Gerber's Sun, Mercury, Venus, Mars and Moon are drawn here, along with the house ring and ascendant axis both charts support. This is a complete chart of what is known, not a partial chart of what is not.
| Thin line, Sun to Mars | TRINE 2.70° |
| Thin line, Mercury to Mars | TRINE 3.82° |
| House ring, drawn | |
Why they click
Every aspect in this pairing runs to the same point: one Mars, met by the other chart's Sun, Mercury and Venus, all by trine. That is a narrow but consistent signal. Identity, thinking and affection all reach the same drive at an easy angle, so the attraction reads as uncomplicated and physically led rather than intellectually entangled. Trines ask nothing of a couple, which is both the appeal and the limit.
Why they clash
Every category sits at the floor of the scale, and that is the honest headline. Three aspects is very little contact between two charts, and all three land on a single planet. There is no Sun to Sun, no Venus to Venus, no Mercury exchange at all. Neither chart reaches the other's core identity or values, so this is less a difficult pairing than a thin one. Both birth times are estimates, so the angles and houses are unavailable, which limits how much more the engine can say.
What each system says
Twelve systems, two people
The Suns are 16.5° apart, outside orb of any aspect, which is why identity reads as an empty channel above.
Goat and Snake are in neither the trines nor the clashes.
Frequently asked
Are Austin Butler and Kaia Gerber astrologically compatible?
Their charts make 3 cross-aspects, the tightest at 2.7° and 3.82°. Astrology does not score a relationship out of a hundred, and the number on this page counts how much contact two charts make, not how well two people do.
What does trine mean between two charts?
A trine puts two placements in easy relation, a flow that takes little effort to access. Austin Butler and Kaia Gerber have 3 trine contacts between them, more than any other type.
Exact, and all soft
Read the relationship as one chart
This page compares Sun, Mercury, Venus and Mars, because those are the four that a birth date alone can place. With no hard contact between the two, a composite chart, the midpoint of both, often reads clean.