His father Zeus, made him immortal.
Hercules was immortal because he was one of the 12 Olympian gods.
Hercules completed twelve labors, the last of which made him immortal.
He had over Confidence.
He became immortal after completing his twelve labors.
Hercules didn't kill any Greek gods. The gods were immortal and could not be killed.
Hercules [Heracles] was half-immortal and he could be defeated only by supernatural forces, and it was magic that ended his mortal life. After his death, he became fully immortal and ascended to Olympus to live among the gods.
You end up not needing it.
He was immortal because he was a god and he was strong,brave, and daring
In the Disney animated film, Hercules was born immortal (as both of his parents are gods) and becomes mortal after drinking a potion. He regains his immortality after proving he is a "true hero" but chooses to stay mortal so he can be with Meg.
Hercules was actually a demigod meaning that he had an immortal father (Zeus) and a mortal mother (Alcmena). It was only after Hercules had been poisoned by his wife that Zeus turned him into a god.
Heracles had four wifes in total (but only one at a time) Before he became an immortal: Megara Omphale Deianira After he became an immortal: Hebe