Brittany Lauren Maynard (November 19, 1984 – November 1, 2014) was an American woman who had terminal cancer and became a right-to-die advocate before committing suicide at the age of 29. Maynard made headlines when a video of her making her suicide threat went viral and was seen by millions of web users. She was diagnosed with glioblastoma, a terminal form of brain cancer in January 2014. She was given six months to live and told her death would be painful because of the aggressive nature of her cancer.

Maynard and her husband Dan Diaz, who had just married when she began having severe headaches, moved from their home in California to Oregon, one of a handful of US states with a "right-to-die" law. She had been trying for a first child with her husband Dan Diaz at the time, but gave up due to her disease. Her story made headlines around the world, and she was featured on the cover of People magazine.

"Goodbye to all my dear friends and family that I love. Today is the day I have chosen to pass away with dignity in the face of my terminal illness, this terrible brain cancer that has taken so much from me... but would have taken so much more," she wrote in a message circulated widely on social media.

"The world is a beautiful place, travel has been my greatest teacher, my close friends and folks are the greatest givers. I even have a ring of support around my bed as I type... Goodbye world. Spread good energy. Pay it forward!"