Kirk Cameron Praying for Safe Return of Missing ‘Growing Pains’ Co-Star

Kirk Cameron says he is praying for his missing "Growing Pains" co-star Andrew Koenig, who was last seen in Vancouver on February 14 and in "a depressed state," according to his father, "Star Trek" star Walter Koenig.

"I am praying for [Andrew's] family during this time of distress and for his safe return," Cameron tells ET. "Andrew, if you're reading this, please call me."

Koenig played Boner, the best friend of Mike Seaver on the hit '80s sitcom, and Cameron goes on to say, "Mike and Boner could always work things out when they put their minds to it. I'm praying for you, pal. Hope to hear from you soon."