Today is missing Colorado City teen Hailey Dunn's 15th birthday.

Monday marked 20 months since Dunn disappeared on December 27, 2010 from her Colorado City home. She was 13-years-old at the time.

Hope for Hailey, an organization dedicated to finding Dunn, updated their Facebook page Tuesday morning wishing Dunn a happy birthday and saying, "We love you and miss you so much!"

Shawn Adkins, the boyfriend of Hailey's mother Billie Dunn at the time of the disappearance, remains the only named person of interest in the case.

If you have any information on Dunn's whereabouts, call the Colorado City Police Department at (325) 728-5294 or call 911.