In an unusual broadside during NBC’s morning hours on Monday, Megyn Kelly blasted Jane Fonda, the 80-year-old Hollywood eminence who has been critical of the NBC host in recent months.

It wasn’t even 10 a.m.

“When she first complained publicly after the program — and repeatedly — I chose to say nothing, as my general philosophy is what other people think of me is none of my business,” Ms. Kelly said, giving NBC viewers a glimpse of her old Fox News persona. “However, Fonda was at it again last week, including right here on NBC, and then again elsewhere. So it’s time to address the ‘poor me’ routine.”

The Kelly-Fonda skirmish began in September, when Ms. Kelly asked about her use of plastic surgery in the first week of “Megyn Kelly Today.” Ms. Fonda seemed thrown by the question, and the clip of the interview went viral, becoming symbolic of Ms. Kelly’s rocky transition from hard-hitting cable news prime time anchor to sunny morning host.

Ms. Fonda has brought up the interview twice in the last week — during a “Today” appearance with co-anchors Savannah Guthrie and Hoda Kotb, and in a Variety interview over the weekend.