Megyn Kelly’s gay joke continues to fall flat.

Debra Messing says she regrets going on “Megyn Kelly Today” after a controversial remark from the new morning show host.

On Monday, the cast of “Will & Grace” joined Kelly on the debut of her new NBC show to promote their rebooted sitcom.

At one point, the former Fox host brought superfan Russel Turner on stage to meet Messing, Will McCormack, Sean Hayes and Megan Mullally.