She was born in Miami, Florida. After spending the first four years of her life on a ranch in Ocala, Florida, she moved with her family to California. As a teenager, she was home-schooled.
Her father is Colombian and her mother, Gina Rue is an former American model. Alexa PenaVega has six siblings which includes her sister, actress Makenzie Vega.
She married film producer Sean Covel on October 10, 2010, but divorced in July 2012.