You'd think an adult man would know that it's never a good idea to threaten the President of the United States.

And Johnny Depp anticipated that his comment about Donald Trump would make him look really bad before he said it in front of the crowd at UK's Glastonbury Festival. But that didn't stop him.

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"This is going to be in the press, and it will be horrible…" he said on Thursday, June 22. "When was the last time an actor assassinated a President?"

The 54-year-old added, "I want to clarify. I'm not an actor. I lie for a living."

The conversation about Trump started when Johnny asked the audience, "Can we bring Trump here?" After the remark was met with loud boos, the Pirates of the Caribbean star stated, "I think he needs help."

Secret Service staff assistant Shawn Holtzclaw told CNN that his team is aware of the Oscar nominee's comments, saying, "For security reasons, we cannot discuss specifically nor in general terms the means and methods of how we perform our protective responsibilities."

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According to the United States Code, "Making any threat to take the life of, to kidnap, or to inflict bodily harm upon the President of the United States" is considered a Class E felony.

Johnny isn't the only celebrity to make jokes about killing the president in recent weeks. Comedienne Kathy Griffin received major backlash last month when she posed with a decapitated Trump head that was covered in blood.

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The photo says it all, but this is what the left thinks is acceptable today. This is the double standard they live by. If a well known conservative did this while working for @foxnews there would be outrage for months. There would be real consequences. Kathy Griffin a regular in @cnn should be ashamed of herself. If this is where you have to go to get noticed maybe you should pick a new line of work. Of course there won't be ramifications to her as that's not the #MSM narrative today. Also, this will not get nearly the coverage it should because it's against @realdonaldtrump from a liberal, but let's just remember this the next time we hear the bs narrative about he behavior of the right. #enoughisenough #kathygriffin Lastly, to those pointing out some stupid pics that some internet badass armchair warrior did in their basement about Obama (that's WRONG as well), but it not the same as a well known "celeb" with an equally famous photographer collaborating and doing it for a mainstream base. Stop pretending that it's the same… it isn't!!!

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“I am sorry. I went too far. I was wrong,” she wrote on Twitter, along with a video message expressing her regret. “I’m a comic. I cross the line. I move the line, then I cross it. I went way too far. The image is too disturbing. I understand how it offends people. It wasn’t funny. I get it." She later lost her New Year's Eve gig with CNN over the incident.

Regardless of your political views, it's never okay to joke about taking someone's life.