Lovato was born in Dallas, Texas to Patrick Lovato and Dianna (Née Hart). She is of Hispanic, Irish and Italian descent. She has two sisters: Dallas Lovato, who is also an actress and singer and is five years older than Demi; and Madison DeLaGarza her half-sister, who is ten years younger than Demi. Her mother, Dianna Hart, was a Dallas Cowboys Cheerleader and country recording artist; her father, Patrick, moved to New Mexico after their marriage ended in 1994. He suffered some health problems and rarely sees Demi. But, the father and daughter saw each other for the first time in four years with a surprise visit in February 2008 by Demi. She is currently home schooled by a tutor due to her career.
Demi Lovato started acting at the age of six, when she landed her first series regular role as Angela on Barney & Friends, there she met her best friend, Selena Gomez. As time went on Lovato pursued her singing and instrumental career, and she guest starred on Prison Break, Split Ends (pilot) and Just Jordan. In January 2007 she landed a series regular role as Charlotte Adams on the Disney Channel original short series As the Bell Rings, which premiered on August 26, 2007 during Disney's Back-to-School special night. She will soon be starring in a new Disney Channel original series called Welcome to Holliwood that begins production in September 2008. Lovato also stars in the Disney Channel Original Movie Camp Rock as Mitchie Torres, which premiered on June 20, 2008. She is a singer and songwriter as well as a musician, playing guitar and piano since the age of eleven.
Lovato had opened for the Jonas Brothers on their summer 2008 Burning Up Tour. She also attended the Disney Channel Games 2008 in spring.
Her good friends, the Jonas Brothers, have also written songs along with Lovato for her debut album, according to USA Today. Lovato covered the Academy Award nominated song "That's How You Know" from Enchanted on DisneyMania 6. Lovato was also voted #2 Hottest Stars in BOP Magazine in September 2008.
Lovato is best friends with fellow Barney & Friends actress Selena Gomez and the pair make YouTube Webcam videos together. When asked a question of how long the pair have been friends, Demi answered "when I asked her to sit on my jacket and draw with crayons (at the Barney auditions)". She is also good friends with the Jonas Brothers, Meaghan Jette Martin, and Alyson Stoner. Her favorite 2 colors are Red and Black. Just like Jonas Brothers and Selena Gomez, Demi wears a purity ring, only as a necklace.
Lovato plays guitar and piano, and writes her own songs, such as "Stronger", "Open", and "Shadow", which has been featured on As The Bell Rings