The 'White House Down' actor - who has previously opened up about his learning difficulties as a child - admits his childhood struggles with education left him worried about his future and he would have accepted "any career" before finding fame as an actor.
He explained: "To be honest, I didn't have a college education, so I would have settled on any career that made some sort of money that was respectful. I never planned on being an actor. I definitely never planned on being a model."
The 33-year-old hunk has enjoyed stratospheric success in Hollywood with movies such as 'Magic Mike' and '21 Jump Street', but Channing mulled over several other career options before falling into acting, including joining the army, becoming a football player and even a veterinarian.
He told The Hollywood Reporter: "You think about a lot of things - the military. I never really entertained going into the military, but when you are 18 and you decide not to go to college, you definitely ask a lot of questions. I always loved animals. I worked at a puppy/kitty nursery in Tampa, Florida, for about a year or something. At that time, I thought maybe I should get a job as a vet tech. I thought maybe I'd go to a tech school for that. I just really don't like school. I am not good at it - especially at that time in my life.
"I had to go figure out [what I wanted to do]. I wish certain things in football happened differently, but it is what it is. I definitely knew I wasn't going to go into the pros ... It just ran its course for me. [But] I am happy that I got on with my life. You don't learn anything by winning all the time."
The star welcomed his first child - daughter Everly - with wife Jenna Dewan-Tatum, 32, last month and reveals he was by her side throughout the labour.
He said: "I was there for the whole thing. That was the most amazing thing I have ever experienced in my life."
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