Diana Ross (born March 26, 1944) is an American singer and actress. Known as the "Queen of Motown", she was the lead singer of the vocal group the Supremes, who became Motown's most successful act during the 1960s and one of the world's best-selling girl groups of all time. They remain the best-charting female group in history, with a total of 12 number-one pop singles on the U.S. Billboard Hot 100.

Following her departure from the Supremes in 1970, Ross embarked on a successful solo career with the release of her eponymous debut solo album. Between 1972 and 1980, Ross recorded four top ten albums with her most successful studio release being the album, Diana. In a fifteen-year span, Ross recorded twelve top ten singles with six -- "Ain't No Mountain High Enough", "Touch Me in the Morning", "Theme from Mahogany (Do You Know Where You're Going To)", "Love Hangover", "Upside Down" and "Endless Love" -- all topping the Billboard Hot 100, making her the female solo act with the most number-one songs in the United States at the time. Ross achieved international success with later songs such as "I'm Coming Out", "Chain Reaction", "If We Hold on Together", and "When You Tell Me That You Love Me".

Ross has also achieved mainstream success and recognition as an actress. Her first role was her Golden Globe Award-winning and Academy Award-nominated portrayal of Billie Holiday in the film Lady Sings the Blues (1972), which made her the first African-American actress to receive an Academy Award nomination for a debut film performance. The film's soundtrack became her only solo album to reach number-one on the U.S. Billboard 200 chart. She also starred in two other feature films, Mahogany (1975) and The Wiz (1978), and later appeared in the television films Out of Darkness (1994), for which she was nominated for a Golden Globe Award, and Double Platinum (1999).

Ross was named the "Female Entertainer of the Century" by Billboard in 1976. Since her solo career began in 1970, Ross has sold over 100 million records worldwide. Between 1964 and 1981, Ross sang on eighteen number one US singles. In 2021, Billboard ranked her the 30th greatest charting artist of all time on the Billboard Hot 100. Her hits as a Supreme and a solo artist combined put Ross among the top-five artists on the Billboard Hot 100 singles chart from 1955 to 2018. She has scored a top 75 U.K. hit single for a record 33 consecutive years (1964–1996). In 1988, Ross was inducted to the Rock and Roll Hall of Fame as a member of the Supremes, and is one of the rare performers to have two stars on the Hollywood Walk of Fame. She is the recipient of a Special Tony Award in 1977, the Kennedy Center Honors in 2007, the Grammy Lifetime Achievement Award in 2012 and 2023 (becoming the first woman to win the award twice, the latter as a member of the Supremes), and the Presidential Medal of Freedom in 2016.

Diana Ernestine Earle Ross was born on March 26, 1944, in Detroit, Michigan. She was the second of six children born to Ernestine (née Moten; January 27, 1916 – October 9, 1984) and Fred Ross Sr. (July 4, 1920 – November 21, 2007). Her mother named her Diane, but the birth certificate was mistakenly filled out with the name Diana. Her family and Detroit friends called her Diane all her life. Ross grew up with two sisters (Barbara and Rita) and three brothers: Arthur; Fred Jr.; and Wilbert, also known as Chico. Ross was raised Baptist.

Ross and her family originally resided at 635 Belmont St., in the North End section of Detroit, near Highland Park, Michigan, where her neighbor was Smokey Robinson. When Ross was seven, her mother contracted tuberculosis, causing her to become seriously ill. Ross's parents sent their children to live with Ernestine's parents, the Reverend (pastor of Bessemer Baptist Church) and Mrs. William Moten in Bessemer, Alabama. After her mother recovered, she and her siblings returned to Detroit.

On her 14th birthday, in 1958, her family relocated to the working-class Brewster-Douglass Housing Projects, settling at St. Antoine Street. Ross attended Cass Technical High School, a four-year college and preparatory magnet school, in downtown Detroit, and, aspiring to become a fashion designer, she took classes in clothing design, millinery, pattern making, and tailoring. In the evenings and on weekends she also took modeling and cosmetology classes and participated in several of the school's extracurricular activities, including its swim team. In 1960, Hudson's downtown Detroit store hired Ross as its first African-American bus girl. For extra income, she also provided hairdressing services to her neighbors. Ross graduated from Cass Tech in January 1962.

At fifteen, Ross joined the Primettes, the sister group to a male vocal group called the Primes, after she had been brought to the attention of music manager Milton Jenkins by Primes member Paul Williams. Among the other members of the Primettes were Florence Ballard, Mary Wilson, and Betty McGlown, Williams' girlfriend. After the Primettes won a talent competition in 1960 in Windsor, Ontario, A&R executive and songwriter, Robert Bateman invited them to audition for Tamla Records.