Matt Dallas Is Gay (Kyle XY Star)

The actor plans to marry boyfriend Blue Hamilton, 25, a record producer who has worked with Justin Bieber.

Matt Dallas, the former star of ABC Family sci-fi series Kyle XY, has announced his engagement -- and in doing so, has come out as a gay man.

“Starting off the year with a new fiancé, Blue Hamilton. A great way to kick off 2013!” the 30-year-old actor wrote on his Twitter account. The announcement was accompanied by a photo of the actor lounging on a couch with a dog.

Hamilton, 25, is a Georgia-born music producer who has worked with Justin Bieber.

Dallas followed up Kyle XY with a recurring role on short-lived ABC witchcraft series Eastwick. He's since appeared in 2012's Naughty or Nice, a Christmas movie on the Hallmark Channel.

Engagements are becoming a popular way for gay celebrities to indirectly acknowledge their intimate orientation. In October, Good Morning America weatherman Sam Champion came out by mentioning his engagement to partner Rubem Robierb in a New York Times article.