Holleah Thomson, 16, has been missing from Joshua since early Wednesday morning.
Her mother, Jennifer Thomson, said she is believed to be a runaway and may be with Justin Luper, 17.
Holleah is 5 feet 3 inches tall and weighs 125 pounds. She has green eyes and blonde hair with dark brown streaks.
Several tips about them being in Alvarado or Burleson have not panned out. Jennifer Thomson said they may be headed to Houston or San Antonio.
Anyone with information on Holleah’s whereabouts should call the Johnson County Sheriff’s Office at 817-556-6019.