UPDATE: Authorities have found the girl in Texas.
Dardanelle police officials have issued an Amber Alert for Sara Elizabeth Alvis, 17.
Last seen wearing a white shirt and blue jeans, Alvis may be with Nicholas Pfeifer, 22. The two may be in a 1992 Ford truck (Arkansas plate 671 JHB).
Anyone with information on Alvis should call (479) 229-2533.