Jasper Hale (born Jasper Whitlock) is the adopted son of Carlisle and Esme Cullen, adoptive brother of Rosalie Hale, as well as Edward and Emmett Cullen, and husband of Alice Cullen. transformation, he gained the ability to sense and manipulate the emotions of those around him.
Alice Cullen (born Mary Alice Brandon) is the adopted daughter of Carlisle and Esme Cullen, adoptive sister of Edward and Emmett Cullen, as well as Rosalie Hale and the wife of Jasper Hale. Alice is petite and pixie-like, with a graceful gait and hair that is short, spiky, and black. Her special ability is to see the future, an enhanced version of her ability to have premonitions as a human.
They met & then meet up wih the rest of the Cullen family on the Twilight series.
Couple Profile Source