Paige's first professional appearance was in the UK tour of the Anthony Newley/Leslie Bricusse musical The Roar of the Greasepaint - the Smell of the Crowd. She made her West End debut in Hair, and went on to featured roles in Jesus Christ Superstar, Nuts, Grease, and Billy (a musical adaptation of the film Billy Liar.)

In 1978, Hal Prince offered the still relatively unknown Paige the title role in Tim Rice (with whom she had - and continues to have - a long-term relationship) and Andrew Lloyd Webber's Evita, which proved to be the defining moment in her evolution to First Lady of British Musical Theatre. For her performance, she won the Society of West End Theatre Award for Best Actress and the Variety Club Award for Showbusiness Personality of the Year.

Paige has portrayed of some of Lloyd Webber's most notable female characters, such as Grizabella in Cats (a role she reprised for a video release) and Norma Desmond in Sunset Boulevard. Similarly, Lloyd Webber's Song and Dance was originally written for Paige, but then produced with Marti Webb, who was one of Paige's successors in Evita, the musical made famous by Madonna in the film version.

By no means has Paige limited her theater credits to Lloyd Webber projects.

In 1986, she appeared as Florence in Chess, (lyrics by Tim Rice, music by Benny Andersson and Björn Ulvaeus, formerly of ABBA), a role she had originated for the 1984 RCA double-disc concept album that had lead to the mounting of the West End production.

She followed this success with a hit revival of Cole Porter's Anything Goes (1989), a triumph as famed French chanteuse Édith Piaf in Pam Gems' musical play Piaf (1993), and another acclaimed revival, Richard Rodgers and Oscar Hammerstein II's The King and I (2000).

In 2004, she sang the role of Mrs. Lovett in the New York City Opera production of Stephen Sondheim's Sweeney Todd.

Paige also has had success in the UK singles charts. I Know Him So Well (from Chess), her duet with Barbara Dickson, held the #1 position in the British charts for four weeks, and still remains the biggest selling record by a female duo in the Guinness Book of Records.

She also had a top ten hit with "Memory" from Cats. Additionally, she has had eight consecutive gold and four multi-platinum albums.

Paige has hosted her own BBC television specials as well as starred in several films for the network, and has also performed in a number of televised Royal Variety Shows.

In 1995, Paige was awarded the Order of the British Empire by Her Majesty the Queen for her contributions to musical theatre.

Recently, Paige has focused on television appearances, playing Dora Bunner in the 2004 ITV adaptation of Agatha Christie's "A Murder is Announced", before performing a guest role in Where the Heart Is.

In September 2004, Paige began a weekly radio show, Elaine Paige on Sunday, on BBC Radio 2, featuring music from musical theatre and film scores.

On 19 December 2005 Ms. Paige hosted a concert with the BBC Concert Orchestra at Birmingham's Symphony Hall, incorporating songs from musicals and Christmas numbers, with guests actor/singer Danny Seward (of "Where The Heart Is" fame) and John Barrowman of musical theatre acclaim (who co-starred with Paige in 1989). The concert was aired on BBC Radio 2 on 23 December 2005.

She has never married, nor had children.