After a #FireColbert movement swept this internet this week, it looks like one very unlikely person declined to join the protest.

Fox News anchor Sean Hannity took to Twitter defending Colbert's right to make his controversial joke about Donald Trump on Monday night.

'I will NOT support #FireColbert. I am vs ALL BOYCOTTS. He is a horrible human being, but if u don't like him change the channel,' he wrote.

Sean Hannity backed Stephen Colbert's controversial joke about Donald Trump this week, tweeting that he 'will not support #FireColbert'

While he didn't go so far as to compliment the liberal host, Hannity wrote: 'I am vs ALL BOYCOTTS'

What started the initial fervor was Colbert's unfortunate choice of words during his monologue on The Late Show.

Referring to Trump, he said: 'You talk like a sign language gorilla who got hit in the head.

'In fact, the only thing your mouth is good for is being Vladimir Putin's c**k holster.'

Some viewers branded the joke 'homophobic,' and FCC Chairman Ajit Pai said in a Thursday interview that the agency had received 'a number of complaints' about the joke and would investigate the incident for a violation of standards.

'So, as we get complaints, and we’ve gotten a number of them, we are going to take the facts that we find and we are going to apply the law as it’s been set out by the Supreme Court and other courts and we’ll take the appropriate action,' he said.

'I have jokes, he has the launch codes. So, it's a fair fight,' Colbert said about Trump and the backlash on his Wednesday show

Pai indicated that any penalty would likely come in the form of a fine.

'Traditionally, the agency has to decide, if it does find a violation, what the appropriate remedy should be. A fine, of some sort, is typically what we do,' he said.

The Late Show airs at 11.35pm during the 'safe harbor' period in which stations are allowed to air 'indecent' or 'profane' material between 10pm and 6am under FCC guidelines.

However, broadcast standards laws prohibit airing 'obscene' material at any time, a legal term referring to prurient sexual content lacking any serious literary, artistic, political, or scientific value.

During his Wednesday show, shortly after Hannity's tweet, Colbert addressed the controversy.

'Welcome to The Late Show. I'm your host, Stephen Colbert. Still? I am still the host? I'm still the host!

'I have jokes, he has the launch codes. So, it's a fair fight,' he added.