GO FRANKIE, GO! TMZSports.com
Frankie Muniz has McDreamy in his corner ahead of his full-time gig with the NASCAR Truck Series ... 'cause Patrick Dempsey tells TMZ Sports he hopes his fellow actor/racer crushes it!!
The 38-year-old former "Malcolm in the Middle" star -- who got into motorsports after his time in front of the camera -- was announced as the driver of the No. 33 Ford for Reaume Brothers Racing last week ... and, will have a full-time seat for 2025.
Dempsey couldn't be more stoked for Muniz .