Diana Hayden was born in family. She went to St.Anns High School, Secunderabad but dropped out in the 8th standard. She continued her studies through open schooling and correspondence and graduated from Osmania University in English.
Before modeling, she used to work for an Event management company called Encore. She then worked as a Public relations officer at BMG Crescendo where she managed careers for models Anaida and Mehnaz. After Anaida's recommendation, she filled in for the Miss India contest. After winning Miss India she proceeded to win the coveted Miss World title.[4
Diana Hayden became popular after the 1997 Miss World pageant at 24. She became the third Indian woman to win the Miss World pageant. She entered Bollywood acting career in the Indian film industry.
Following her tenure as the global representative for the prestigious Miss World organization, Diana moved to the UK and studied acting at the Royal Academy of Dramatic Arts. She also studied at Drama Studio London, where she concentrated on the works of Shakespeare and earned a Best Actress nomination from the studio. In 2001, she made her screen debut in the film version of Shakespeare's Othello in South Africa.
In 2006, Diana was signed by the Avalon Academy as the face of the Academy and currently serves as a celebrity guest lecturer for airline personnel training programs.
After failing to make a mark in Bollywood, Hayden moved to Los Angeles and devoted herself to social causes. In 2008, Diana Hayden became a wild card entry on the popular Indian show, Bigg Boss, which is based on the original Dutch show, Big Brother. She was voted out from Bigg Boss 2 house on the episode that aired on Nov 7th 2008.