Jennifer Lynn Lopez was born on July 24, 1969 in The Bronx, New York City, New York to teacher Lupe López and computer specialist David López. The two Puerto Ricans were brought to the continental United States during their childhoods and eventually met while living in New York City. Their daughters would have a stable, middle-class upbringing.

Jennifer always dreamed of being a multi-tasking superstar. As a child, she enjoyed a variety of musical genres, mainly Afro-Caribbean rhythms like salsa, merengue, and bachata, and mainstream music like pop, hip-hop, and R&B. Although she loved music, the film industry also intrigued her. Her biggest influence was the Rita Moreno musical, West Side Story (1961). At 5, Jennifer began taking singing and dancing lessons. Aside from being a budding entertainer, Jennifer was also a Catholic schoolgirl, attending eight years at a Catholic elementary school named Holy Family, located in The Bronx, before graduating from all-girls prep school Preston High School after a four-year stay. At school, Jennifer was an amazing athlete and participated in track and field and tennis. She spent most of her upbringing in a two-story house in the Castle Hill neighborhood.

At 18, Jennifer moved out of her parents' home. After high school, she briefly worked in a law office and took dance classes at night. During this time, she continued dance classes at night. Her big break came when she was offered a job as a fly girl on Fox's hit comedy In Living Color (1990). After a two-year stay at In Living Color (1990) where actress Rosie Perez served as choreographer, Lopez then went on to dance for famed singer-actress Janet Jackson. Her first major film was Gregory Nava's My Family/Mi familia (1995), and her career went into overdrive when she portrayed late Tejana singer Selena in Selena (1997).