The actress, who won Academy Awards in 1947 and 1950, is the oldest living Oscar-winner, is one of the last survivors from the classic era of Hollywood films that spawned beloved epics like Gone with the Wind and Casablanca.

As a result, she feels like a relic of a bygone age, and believes movie fans may not realise she's still very much alive and kicking.

"Anyone who has ever heard my name has the distinct impression I was put under the sod years ago," she tells British newspaper The Times in an interview marking her 100th birthday. "I feel like a survivor from an age people no longer understand."

Having outlived her contemporaries, including her sister and fellow actress Joan Fontaine, who died in 2013, she says she is still in good shape as tells the paper her doctor informed her that she was a "magnificent organism".

The Gone With The Wind star, who has lived in France since 1953, puts her robust health down to the effectiveness of French medicine.

"For every complaint known to man, and for the extra ones known only to the French, there is an armoury of medicines," she explains.

The centenarian rose to fame as a leading lady in 1930s Hollywood, earning particular acclaim for her on screen partnership with Australian swashbuckler Errol Flynn in films like 1935's Captain Blood, and most famously in the 1938 historical epic The Adventures of Robin Hood.

Olivia, who played Robin Hood's love interest Maid Marian in the movie, admits that she was strongly attracted to Errol, saying, "I had a very big crush on Errol Flynn, I thought he was absolutely smashing."

However she is now glad that she did not become romantically involved with the famous Lothario, adding,"Nothing came of it. I'm not going to regret that. It could have ruined my life."

As for today's stars, despite feeling like a woman out of fashion, she has huge praise for a number of actors including Daniel Day-Lewis, who she declares a "genius", and Mark Rylance, describing herself as "overwhelmed by his accomplishments". Actresses she admires include Kate Winslet and Meryl Streep.

Despite rising to stardom over 80 years ago, Olivia, feels it is only now she is comfortable with her fame.

"I think overnight success when you are very young is extremely disorientating It is something I would not wish on anyone, and to survive it takes not only fortitude but luck," she reasons. "It may be that only now am I adjusting to it, overcoming it."