A natural-looking smile with teeth comes down to one thing most people miss: your eyes. The mouth can fake a smile, but without the muscles around your eyes joining in, the result looks stiff or forced. The good news is that with a few adjustments to how you engage your face, relax your jaw, and think about what triggers your smile, you can consistently produce a genuine, teeth-showing expression.
Why Forced Smiles Look Wrong
When you deliberately pull your lip corners outward to show your teeth, you’re only activating the muscles that lift the corners of your mouth. This produces what’s sometimes called a “Pan Am smile,” named after flight attendants who flashed polite but hollow grins at passengers. It looks flat because the upper half of your face stays motionless.
A genuinely warm smile recruits a second key muscle group: the ring of muscle surrounding each eye. When this muscle contracts, your cheeks push upward, the skin at the outer corners of your eyes crinkles slightly, and your lower eyelids rise just a bit. This combination is what researchers call a Duchenne smile, and it’s what people instinctively read as authentic. The difference is visible in photos instantly. A mouth-only smile makes you look like you’re posing. A smile that reaches the eyes makes you look happy.
How Much Teeth Should Show
There’s no single “correct” amount of tooth display, but dental research gives a useful benchmark. During a relaxed, natural smile, the upper lip typically rises enough to reveal about 10 millimeters of your upper front teeth, roughly their full visible length down to the gum line. If your lip sits lower, you might show 75% or less of those teeth, which is perfectly normal and still looks balanced.
What matters more than exact millimeters is the curve your upper teeth form relative to your lower lip. In the most visually harmonious smiles, the edges of the upper teeth follow a gentle arc that runs parallel to the curve of the lower lip. This is called a consonant smile. You can’t force this alignment, but knowing it exists helps explain why some smiles feel “right.” If your teeth and lip curves naturally match up, leaning into a slightly wider smile will look great. If they don’t, a softer smile with moderate tooth display tends to photograph better.
Engage Your Eyes First
The single most effective trick for a natural-looking smile is to start with your eyes, not your mouth. Before you pull your lips back, try gently narrowing your eyes as if you’re looking at something that genuinely delights you. Photographers sometimes call this “squinching,” a subtle tightening of the lower eyelid. It’s not a squint. It’s a slight lift that mimics what happens automatically when you’re truly amused.
Once your eyes are engaged, let your mouth follow. The smile will look like it originated from emotion rather than from a conscious decision to show teeth. Practice this in a mirror: first smile with only your mouth, then smile while slightly narrowing your eyes at the same time. The difference is dramatic.
Use a Mental Trigger
Your facial muscles respond to emotional signals faster and more naturally than to mechanical instructions. Instead of thinking “pull my lips back and show teeth,” think of something that makes you genuinely happy or amused. A specific memory works better than a vague concept. The moment your dog did something ridiculous, the punchline of a joke that always gets you, the face your friend makes when they’re confused. The more specific and vivid the memory, the more your face will respond with authentic muscle engagement, eyes included.
Professional portrait photographers use a version of this called the “laugh and hold” method. They ask the subject to force out the biggest, most exaggerated fake laugh they can on the count of three. The fake laugh itself looks terrible, but the genuine laughter that follows (usually at the absurdity of what just happened) produces real smiles. You can do this yourself before a photo or a video call: force a loud, silly laugh, then let your face settle into the natural expression that comes after.
Release Jaw Tension
Many people carry tension in their jaw without realizing it, especially if they clench or grind their teeth. A tight jaw makes any smile look strained because the lower face can’t move freely. Before you need to smile (a photo, a presentation, a date), spend 30 seconds loosening up.
The simplest method is deliberate yawning. Open your mouth as wide as comfortable, take a deep breath in, exhale, and repeat two or three times. This stretches and relaxes the muscles on both sides of your jaw. You can also massage the hinge of your jaw with your fingertips in small circular motions for about 10 seconds, then slowly open and close your mouth. Repeat that cycle a few times. The goal is to get your lower face feeling loose and mobile so that when you smile, the movement flows rather than fighting against clenched muscles.
Practice Symmetry With Facial Exercises
Most people’s smiles are slightly asymmetrical, with one side lifting higher or faster than the other. This is normal, but if the imbalance bothers you, targeted exercises can help strengthen the weaker side over time.
Try the cheek lifter: open your mouth into an “O” shape and fold your upper lip over your teeth. Then smile to push your cheek muscles upward. Place your fingers lightly on the tops of your cheeks, release the muscles to lower them, then lift again. Repeat 10 times. This isolates the muscles responsible for pulling your lip corners up and trains them to fire more evenly.
Another option is to smile without showing your teeth, purse your lips together, then smile again while pressing your cheek muscles upward. Slide your fingers from the corners of your mouth up to the tops of your cheeks and hold for 20 seconds. A Northwestern University study on facial exercises found that consistent practice produced visible improvements in cheek fullness and mid-face appearance, both of which contribute to how your smile looks.
Positioning for Photos
Even a genuinely felt smile can look odd if your head angle works against you. A few small adjustments help:
- Tilt your chin down slightly. Lifting your chin exposes your nostrils and makes the smile look like you’re peering down at the camera. A small downward tilt keeps the focus on your eyes and mouth.
- Angle your face a few degrees off-center. A straight-on shot flattens your features. Turning your head just slightly to one side adds dimension and often makes your smile look more relaxed.
- Don’t hold it too long. A smile that’s been frozen in place for several seconds starts to decay into a grimace. If you’re posing, reset between shots. Look away, relax your face completely, then smile fresh for the next one.
- Keep your tongue lightly pressed behind your upper front teeth. This subtle placement naturally opens your lips to a flattering width and prevents the “too tight” look that comes from pressing your lips hard against your teeth.
Putting It All Together
The sequence that consistently produces a natural, teeth-showing smile looks like this: first, release any jaw tension with a yawn or quick massage. Second, think of something specific that makes you happy or amused. Third, let your eyes respond to that thought by softening and slightly narrowing. Finally, let your mouth follow your eyes into the smile. The teeth will show on their own without you having to manually position your lips.
If you’re practicing in a mirror, pay attention to what your eyes are doing rather than obsessing over your teeth. The moment your eyes look warm and engaged, whatever your mouth is doing will read as genuine. Over time, this sequence becomes automatic. You stop thinking about the mechanics and start simply recalling a feeling, which is exactly how a natural smile works in the first place.