Story highlights Actor Clint Howard, who's been in a long list of films including "Apollo 13," is backing Ted Cruz for president

Howard, brother to Ron, says over the years he's grown more conservative

"I've come to realize that if in fact it does hurt me in the entertainment business, at this point in my life, that's OK," he says

West Des Moines, Iowa (CNN) You might remember him as Balok the creepy child alien in "Star Trek" or the geeky flight controller in "Apollo 13", but this week, actor Clint Howard is far from Hollywood, working as a volunteer phone banker for Republican presidential candidate Ted Cruz in Iowa.

Howard donated to Cruz's campaign last year and flew to Des Moines to support him before the caucuses. On Wednesday night, he was among hundreds of others at a Cruz rally here to promote Cruz's campaign and oppose abortion.

"Over the years I've grown more conservative," Howard told CNN after the event. "I've come to realize that if in fact it does hurt me in the entertainment business, at this point in my life, that's OK. The cloth's been cut. I am who I am."

Howard hasn't kept his conservative politics a secret in recent years. In 2010 he performed in a video for the conservative activist group Heritage Action and he has talked openly about his beliefs. He said he supports Cruz because of his positions on foreign policy and right-to-life issues.

In liberal-leaning California, Howard is part of a secretive tight-knit community of conservatives in the entertainment industry who meet regularly to talk about issues, but normally shun publicity.

Read More