Social smile

What is this milestone?

Smiles in response to people or voices

The social smile is one of the most rewarding early milestones. Unlike the reflexive, 'gas-induced' smiles seen in the first few weeks, this is a genuine, intentional expression of happiness in response to seeing a face, hearing a voice, or feeling a gentle touch.

Why it matters

This milestone marks a significant leap in social and emotional development. It demonstrates that your baby is beginning to understand social reciprocity—the back-and-forth rhythm of communication—and is actively seeking connection with you and others.

What to expect leading up to it

Before this emerges, you might notice your baby studying your face more intently, making brief eye contact, or appearing to calm down when they hear your voice. These moments of focused attention are laying the groundwork for that first big grin.

How to encourage and support it

Get up close! Babies at this age focus best on objects 8-12 inches away. Talk, sing, and make exaggerated facial expressions. Respond enthusiastically when they do smile to reinforce that their actions have a positive, loving effect on the world.

When to talk to your doctor

Most babies smile socially between 6 weeks and 2 months, and some take a little longer. If your baby is not smiling back at you by 3 months, or does not look at your face or make eye contact, mention it at your next visit. These are usually nothing, but they are worth checking early. And at any age, if your baby loses a skill they already had, tell your pediatrician that week.