The Dark Knight Rises actor said that promoting the film Lawless at the Cannes Film Festival helped him realise that being a celebrity is too demanding.
"I saw what it meant to be a movie star for a second and I quite liked it. Then I went, 'Nah! Let's go back to work'," Hardy told The AP.
The British star added of the dangers of courting fame: "I like shiny things, but all that glitters isn't gold. There's nothing that comes without cost.
"I've got enough cost in my life. I've got enough risk going on. I'm already crazy enough."
Hardy went on to say that he is much more enthusiastic about the craft of acting than the rewards that come with it.
"When I'm working, I have this discipline and I get meaning from it. It gives me purpose," he explained. "I can turn to my little boy and say, 'Daddy does something. And I do it well. I may not be the best, but I'm the best that I can be. Now eat your f**king greens!'"
The Dark Knight Rises hits cinemas on July 20 in the US and the UK.
Watch a trailer for The Dark Knight Rises below: