Tributes have been paid to legendary actress and singer Doris Day who has died at the age of 97.

The Doris Day Animal Foundation announced the Hollywood icon's death, saying she passed away early on Monday at her home in California after contracting a "serious case of pneumonia."

Day was best known for her work in the late 1950s and 1960s, appearing in films such as Calamity Jane and Pillow Talk.

Day was born Doris May Ann Kappelhoff in Cincinnati, Ohio in 1922 a descendant of German immigrants to the US. While working as a singer in 1939 she adopted the stage surname 'Day'.

Doris Day as Calamity Jane in themusical Calamity Jane in 1953

Day scored her first hit recording with Sentimental Journey in 1945, becoming the world's highest-paid female singer in 1946.

Her first film role came in 1948's Romance on the High Seas. The following year she starred in two films; My Dream is Yours and It's a Great Feeling.

By the time Day starred in 1953's Calamity Jane, which saw her take on the title role, she had starred in a further 11 features, making her early career very prolific.

In Calamity Jane Day performed the song Secret Love, which won the Academy Award for Best Original Song.

Her performance in 1960's Pillow Talk earned her an Oscar nomination for Best Actress in a Lead Role.

Day was the recipient of the Golden Globe Henrietta Award for World Film Favourites in 1958, 1960 and 1963, and was later honoured with the Cecil B DeMille Award in 1989, which is bestowed upon those who make "outstanding contributions to the world of entertainment."

In 2008 she was awarded the Grammy Lifetime Achievement Award in 2008, having been inducted into the Grammy Hall of Fame in 1998 for Sentimental Journey, in 1999 for Secret Love and again in 2012 for Que Sera Sera.

Day was a keen animal welfare activist and appeared in a series of newspaper advertisements against the wearing of fur.

In 1978 she founded the Doris Day Pet Foundation, which is now named the Doris Day Animal Foundation.

Day was married four times; to Al Jorden (1941-43), George Weidler (1946-49), Martin Melcher (1951-68) and Barry Comden (1976-81). She had one song, Terry, with her first husband. Terry died in 2004.

Take a look at our Doris Day - A Life In Pictures gallery here

A host of Hollywood stars have taken to social media to pay tribute to the late actress. Take a look at some of the tributes below.