Houston Tumlin, who starred as a child actor 15 years ago in 'Talladega Nights,' has taken his own life.
Houston shot himself in the head inside his home in Pelham, Alabama around 4:30 PM Tuesday ... Shelby County Coroner Lina Evans tells TMZ.
We're told Houston's girlfriend was inside the home at the time of his suicide ... and so far, no note has been found.
Houston is best known for playing the foul-mouthed, 10-year-old Walker Bobby, son of Will Ferrell's character Ricky Bobby, in the 2006 comedy, "Talladega Nights: The Ballad of Ricky Bobby.