Not too long ago there was a slight panic in the fandom when it became unsure whether or not Misha Collins would return as Castiel. But rest assured, he’ll be there.
Collins, who first appeared as Castiel in the show’s fourth season, is a regular on the current ninth (he has not been in every episode). But questions over his return prompted fans to send in postcards and blue ties to The CW in an impromptu grassroots campaign.
Along with Jensen and Jared, Misha will star in the tenth season.
Source: The Hollywood Reporter