The divine twins are youthful horsemen, either gods or demigods, who serve as rescuers and healers in Proto-Indo-European mythology.

Like other Proto-Indo-European divinities, the Divine Twins are not directly attested by archaeological or written materials, but scholars of comparative mythology and Indo-European studies generally agree on the motifs they have reconstructed by way of the comparative method.

Scholar Donald Ward proposed a set of common traits that pertain to divine twin pairs of Indo-European mythologies:

Although the Proto-Indo-European (PIE) name of the Divine Twins cannot be reconstructed with certainty based on the available linguistic evidence, the most frequent epithets associated with the two brothers in liturgic and poetic traditions are the "Youthful" and the "Descendants" (sons or grandsons) of the Sky-God (Dyēus).

Two well-accepted reflexes of the Divine Twins, the Vedic Aśvins and the Lithuanian Ašvieniai, are linguistic cognates ultimately deriving from the Proto-Indo-European word for the horse, *h₁éḱwos. They are related to Sanskrit áśva and Avestan aspā (both from Indo-Iranian *Haćwa), and to Old Lithuanian ašva, which all share the meaning of "mare". This may point to an original PIE divine name *h₁éḱw-n-, although this form could also have emerged from later contacts between Proto-Indo-Iranian and Proto-Balto-Slavic speakers, which are known to have occurred in prehistoric times.

Represented as young men rescuing mortals from peril in battle or at sea, the Divine Twins rode the steeds that pull the sun across the sky and were sometimes depicted as horses themselves. They shared a sister, *H₂éwsōs 'Dawn', who is also portrayed as the daughter of *Dyēus 'Sky' in Indo-European mythology. The two brothers are generally depicted as healers and helpers, travelling in miraculous vehicles to save shipwrecked mortals. They are often differentiated: one is represented as a physically strong and aggressive warrior, while the other is seen as a healer who gives attention to domestic duties, agrarian pursuits, or romantic adventures.

In the Vedic, Greek and Baltic traditions, the Divine Twins similarly appear as the personifications of the morning and evening star. They are depicted as the lovers or the companions of a solar female deity, preferably the Sun's daughter but sometimes also the Dawn. In most stories in which they appear, the Divine Twins rescue the Dawn from a watery peril, a theme that stems from their role as the solar steeds.

During the night, the Divine Twins were said to return to the east in a golden boat, where they traversed a sea to bring back the rising sun each morning. During the day, they crossed the nocturnal sky in pursuit of their consort, the morning star. In what seems to be a later addition confined to Europe, they were said to rest at the end of the day on the Fortunate Isles, a land situated in the sea in the West with magical apples on it in the Garden of the Hesperides. By the Bronze Age, the Divine Twins were also represented as the coachmen of horse-driven solar chariots.