The parents of Andrew Koenig -- who has reportedly been missing for the past week -- described their son as "suffering from depression" and "not doing good" in the days leading up to his disappearance.

Judy and Walter Koenig (who played Pavel Chekov in the "Star Trek" series) tell TMZ the last time heard from Andrew was on February 9. They say his cell phone is turned off and that they have learned the last time his phone received a text was on February 16 in Vancouver.