'Road Trip' Actress -- Dead At 36

Mia Amber Davis -- the big girl who seduced DJ Qualls' character in "Road Trip" -- has passed away ... this according to her friends at Plus Model Magazine.

Mia Amber Davis Dead

The details surrounding Mia's death are still emerging ... and so far, no cause of death has been released.

According to MediaTakeOut.com, 36-year-old Mia is survived by her husband Mike.