Thalia was one of the three Charites (Graces) in Greek mythology, the other two being her sisters Aglaea and Euphrosyne. Their father was Zeus, and their mother was either the Oceanid Eurynome, or Eunomia, the goddess of lawful order. Thalia was the goddess of festivity.
See Also: Charites, Aglaea, Euphrosyne, Zeus, Eurynome