Grace Victoria Cox (born March 10, 1995) is an American actress, known for playing Melanie Cross in the CBS series Under the Dome during the show's second and third seasons. At age 13, Cox realized that acting was what she wanted to with her life. She majored in Theater of Arts schools until the completion of her junior year of high school. In 2012, she moved to Los Angeles where she started pursuing a career in acting while finishing high school. Cox appeared in the television series Under the Dome as Melanie Cross from 2014 to 2015. She has one younger sister and a younger brother.