Tom Brady: Props to Boston Marathon Survivor ... 'She's My Inspiration'

Tom Brady is paying tribute to the most badass person in the Boston Marathon -- Adrianne Haslet -- who's currently running the full 26.2 on a prosthetic leg after losing it in the terror attack 3 years ago.

Adrianne's story is incredible ... she was at the marathon as a spectator in 2013 when she was badly injured in the explosion. She vowed to show the world the cowards couldn't break her spirit.

Haslet met Brady in 2014 -- and clearly made an impression on him. He just took to Facebook and wrote:

"Two years ago I was lucky enough to meet Adrianne Haslet, a survivor of the 2013 Marathon bombings. She's on the course now, running the race for the first time -- with a prosthetic leg. Adrianne thank you for being my inspiration!! ‪#‎BostonStrong‬."

Adrianne began her training months ago ... and when she appeared on the "TMZ Sports" TV show recently, she told the guys what motivated her during those grueling running sessions.

"I'm running for those who can't run and those that are being attacked ruthlessly by these cowards and I'm really happy to be doing that."

She's currently on the course. We can't wait to see those pics of AH crossing the finish line!

#BostonStrong