At the 70th Academy Awards, for the 1997 film year, the Oscar for Writing (Screenplay Written Directly for the Screen) went to Good Will Hunting, credited to Ben Affleck and Matt Damon. The Academy's acceptance-speech record lists the ceremony as March 23, 1998, at the Shrine Auditorium. So the award belongs to the 1997 awards year, but it was handed over in 1998.
One screenplay, two names on the credit. Matt Damon turns 56 on October 8, which makes this a good week to ask what their birth charts look like side by side. The short answer is two different ways of building the same thing.
What's public, and what this is
According to Wikipedia, Damon is an actor, film producer and screenwriter. Affleck is an actor and filmmaker whose directing includes Gone Baby Gone (2007), Argo (2012) and Air (2023). The two established the production companies Artists Equity and the former Pearl Street Films. That's the only career context used here.
What follows is a symbolic reading of two birth dates, not an account of how either man writes, directs or decides anything. Both catalogue profiles store a birth time, but neither clock was corroborated for this piece. So both charts are date-only: each birthday was sampled every hour plus 23:59 in its local time zone, with Lunara's central Swiss Ephemeris engine. There's no Rising sign and no houses, and only placements that hold all day are used.
The two charts at a glance
Matt Damon
- Born: October 8, 1970, Cambridge, Massachusetts
- Sun: Libra, about 14–15°
- Mercury: Libra, about 1–2°
- Venus: Scorpio, about 22–23°
- Mars: Virgo, about 22–23°
- Moon: Capricorn all day
Ben Affleck
- Born: August 15, 1972, Berkeley, California
- Sun: Leo, about 22–23°
- Mercury: Leo, about 11° (retrograde)
- Venus: Cancer, about 7–8°
- Mars: Virgo, about 0–1°
- Moon: Scorpio all day
No personal planet changes sign on either birthday, so there are no alternatives to carry. Affleck's Mars sits in the first degree of Virgo, but it stays there for the whole sampled day.
The Libra and Leo Suns are a sign apart that astrologers call compatible, but the actual distance is about 51–53°. That's 7–9° short of an exact sextile, outside the 6° sextile orb used for this comparison.
Making: a Mercury that weighs and a Mercury that stages
Mercury is the planet astrologers connect with language, drafting and how an idea gets shaped.
Damon's Mercury sits in the first two degrees of Libra all day. It makes a sextile to Neptune and leans toward Pluto across the sign line. Libra Mercury is read as weighing: hearing both sides, adjusting for fit, revising toward balance. The Neptune sextile adds a reading of imagination entering that measured process. The Pluto contact adds a pull toward the heavier version of a line.
Affleck's Mercury is at about 11° Leo, and it was retrograde that day. Leo Mercury is read as staging: how a thought lands, how it plays in a room. A retrograde Mercury is traditionally read as revisiting and reworking rather than moving straight ahead. The symbolic picture is a draft that keeps being re-blocked for effect.
Neither version is the writer's way. One is read as building toward fit, the other toward impact.
Deciding: one Virgo Mars, two kinds of company
Mars is the planet astrologers connect with action, and with the decision to commit to something. Here's the clearest shared point: both Mars placements are in Virgo, the sign associated with craft, method and getting the detail right. They're about 22° apart in the sign, though, and they keep very different company.
Damon's Mars, at about 22–23° Virgo, is bound into a tight pattern. It sextiles Venus in Scorpio almost exactly, and both connect to Saturn in Taurus: Mars by trine, Venus by opposition, each within about a degree. Saturn is the planet of limits and deadlines. Symbolically, desire and effort get decided against a standard: is this finished, by the rule I set?
Affleck's Mars, at about 0–1° Virgo, trines Jupiter at the end of Sagittarius and squares Neptune. Jupiter is read as scale and appetite for the larger version, Neptune as vision and the image in the mind's eye. The square adds friction between precise method and an ideal that keeps moving. Symbolically, the decision is pulled toward what could this become?
Same sign of craft. One Mars is checked by Saturn, the other stretched by Jupiter.
Two questions for your own work
If you make things with someone else, or even alone, these two placements turn into practical questions:
- Whose idea gets polished? Notice which ideas you keep refining for fit, and which you keep re-staging for effect. If you work with a partner, ask which version of a draft each of you instinctively returns to.
- Who chooses when to stop revising? Is your stopping point a rule ("it meets the brief") or a horizon ("it's as big as it can get")? Try writing down your stopping rule before the next revision and see whether you keep it.
Neither answer is better. The point is to know which instinct is driving, so the other one gets a turn.
Find your own Mercury and Mars
The free natal chart calculator shows your Mercury and Mars signs, and whether your Moon sign holds all day if you don't know your birth time. If you'd like your whole chart interpreted in writing, there's an optional paid personal birth chart reading. It covers your own chart only, not a working-partnership score. What's included and the price are shown before you buy.
Positions are tropical and geocentric, sampled hourly plus 23:59 for October 8, 1970 (America/New_York) and August 15, 1972 (America/Los_Angeles). They're sampled ranges, not continuous bounds. Birth dates, places and career facts come from the subjects' Wikipedia articles.
Text written with AI assistance. The positions are calculated, not estimated.