ET has learned the 60-year-old actress went into cardiac arrest on a United Airlines flight on Friday.
The late actress' dog was almost as famous as Fisher herself! Click through the gallery and relive their love from over the years.
The legendary actress was famously known for her role as Princess Leia in the original 'Star Wars' trilogy.
Brother Todd Fisher exclusively tells ET the family "hopes for the best" for the 60-year-old actress.
The Hollywood icon's death came at one of the busiest times of her legendary career.
A source told ET the 'Star Wars' actress was "looking forward" to spending more time in the U.K.
Fisher's ex-husband says the late actress was a 'special, wonderful girl.'
The actor reflected on his late co-star's life and legacy in an emotional statement to ET.
The actresses co-starred on an episode of '30 Rock' in 2007.
The cast took to social media to extend their sincerest condolences to Lourd just hours after her mother died.
The '30 Rock' creator said she felt 'so lucky that I got to meet her' in a statement following Fisher's death on Tuesday.
The actor released a touching statement celebrating his 'fiercely independent & ferociously funny' friend and co-star.
Fisher had plenty of advice for Ridley when she joined the 'galaxy far, far away' as the newest heroine in 'Star Wars: The Force Awakens' last year.
The iconic actress openly discussed her personal struggles with bipolar disorder to ET over the years.
