Compliments of IMDB, here are some things you probably didn't know about Hollywood icon Lauren Bacall.

Her appearance on a cover of Harper's Bazaar magazine at 18 years of age led to her first film role.

She used her mother's maiden name of Bacal, but added an extra "L" when she began making movies.

At the funeral for her husband, Humphrey Bogart, she put a whistle in his coffin. It was a reference to the famous line she says to him in their first film together "To Have and Have Not":  Bacall looked at Bogart in the movie and said "You know how to whistle, don't you? You just put your lips together and blow.".

Shortly after Humphrey Bogart's death, she announced her engagement to Frank Sinatra to the press. Sinatra promptly backed out.

She lived in the same New York apartment building (The Dakota) as Beatle John Lennon when he was murdered in 1980.  She heard the gunshot but assumed that it was a car tire bursting or a vehicle backfiring.