'Like a lot of Americans, I'm under a lot of stress right now, Dolly!' exclaimed Colbert as Parton sang 'Bury Me Beneath the Willow.'

The late-night host also explained why he opted not to watch Day 3 of the Republican National Convention.

The topic of the cognitive test came up again when Fox news anchor Chris Wallace interviewed Trump and told him that 'it’s not the hardest test.'

During the last-minute appearance on Stephen Colbert's 'The Late Show,' Hanks also spoke about donating plasma with his wife Rita Wilson to help fight COVID-19

The late-night host also roasted Donald Trump for his alleged smear campaign against Dr. Fauci.

'He talks so much about corruption, but this may be the most corrupted administration in history,' said the former 'Daily Show' host of the U.S. President.

'You've really insulted me now by calling me naive,' said the U.S. President's former National Security Advisor in response.

'The Late Show' host admitted that he wouldn't want to interview the "boring" U.S. President again after he played their only interview "extremely safe."

During the COVID-19 pandemic, the 'Late Show' host enlisted Matthew McConaughey — an experienced Zoom user — to enlighten him with some tips about the video-calling platform.

In the midst of the COVID-19 pandemic, the much-beloved TV hosts guested on each other's virtual late night shows on Tuesday.