Question: How long has the award been given that Glynis Johns won an award for her role of Desiree Armfeldt?

Context paragraphs:
Miranda (1948 film): Miranda is a 1948 British comedy film, directed by Ken Annakin and written by Peter Blackmore, who also wrote the play of the same name from which the film was adapted.  Denis Waldock provided additional dialogue.  A light comedy, the film is about a beautiful and playful mermaid played by Glynis Johns and her effect on Griffith Jones' character.  Googie Withers and Margaret Rutherford are also featured in the film.  Glynis Johns and Margaret Rutherford reprised their roles in the 1954 sequel, "Mad About Men".

The Halfway House: The Halfway House is a 1944 British drama film directed by Basil Dearden and starring Mervyn Johns, his daughter Glynis Johns, Tom Walls and Françoise Rosay.  The film tells the story of ten people who are drawn to stay in an old inn near the Welsh countryside.  The film was shot at Barlynch Abbey on the Devon/Somerset border.

Zelly and Me: Zelly and Me is a 1988 American drama film written, directed and produced by Tina Rathborne.  The film stars Isabella Rossellini, Glynis Johns and Alexandra Johnes, and features film-maker David Lynch in a minor role.

Papa's Delicate Condition: Papa's Delicate Condition is a 1963 comedy film starring Jackie Gleason and Glynis Johns.  It was an adaptation of the Corinne Griffith memoir of the same name, about her father and growing up in Texarkana, Texas.  Jimmy Van Heusen (music) and Sammy Cahn (lyrics) won an Academy Award for Best Song for "Call Me Irresponsible".

The Card (1952 film): The Card is a black-and-white film version of the novel by Arnold Bennett.  Entitled The Promoter for its American audience, it was adapted by Eric Ambler and directed by Ronald Neame.  It was released in 1952.  It starred Alec Guinness as Denry Machin, Petula Clark as Nellie Cotterill, Valerie Hobson as the Countess, and Glynis Johns as Ruth Earp.  The film was nominated for the Academy Award for Best Sound.

Tony Award for Best Actress in a Musical: The Tony Award for Best Performance by a Leading Actress in a Musical is awarded to the best actress in a musical, whether a new production or a revival.  The award has been given since 1948, but the nominees who did not win have only been publicly announced since 1956.

Perfect Strangers (1945 film): Perfect Strangers (United States title: Vacation from Marriage), is a 1945 British drama film made by London Films.  It stars Robert Donat and Deborah Kerr as a married couple whose relationship is shaken by their service in the Second World War.  The supporting cast includes Glynis Johns, Ann Todd and Roland Culver.  It was produced and directed by Alexander Korda from a screenplay by Clemence Dane and Anthony Pelissier based on a story by Clemence Dane.  Dane won the Academy Award for Best Story.  The music score was by Clifton Parker and the cinematography by Georges Périnal.

Mary Poppins (film): Mary Poppins is a 1964 American musical-fantasy film directed by Robert Stevenson and produced by Walt Disney, with songs written and composed by the Sherman Brothers.  The screenplay is by Bill Walsh and Don DaGradi, loosely based on P. L. Travers' book series "Mary Poppins".  The film, which combines live-action and animation, stars Julie Andrews in the role of Mary Poppins who visits a dysfunctional family in London and employs her unique brand of lifestyle to improve the family's dynamic.  Dick Van Dyke, David Tomlinson, and Glynis Johns are featured in supporting roles.  The film was shot entirely at the Walt Disney Studios in Burbank, California using painted London background scenes.

Third Time Lucky (1949 film): Third Time Lucky is a 1949 British crime drama film directed by Gordon Parry and starring Glynis Johns, Dermot Walsh and Charles Goldner; Michael Hordern appears in the small uncredited role of "2nd Doctor".  The film was made by producer Mario Zampi and released by General Film Distributors.  It was shot at Twickenham and Southall Studios.

Glynis Johns: Glynis Johns (born 5 October 1923) is a retired Welsh stage, television and film actress, dancer, pianist, and singer.  Born in Pretoria, South Africa of Welsh origin, she is best known for creating the role of Desiree Armfeldt in "A Little Night Music" on Broadway, for which she won a Tony Award, and for playing Winifred Banks in Walt Disney's musical motion picture box office smash "Mary Poppins."  In both roles, she originated songs written specifically for her, including "Send in the Clowns", composed by Stephen Sondheim, and "Sister Suffragette", written by the Sherman Brothers.  She was nominated for an Oscar for her work in the 1960 film "The Sundowners".

Supporting paragraphs: Glynis Johns Tony Award for Best Actress in a Musical
Answer: 1948