The cast of TODAY lost it this morning when Sylvia Jeffreys invaded Karl Stefanovic's turf, making a ribald crack while the team commentated on a viral video.

The footage, which shows a woman with a feed bucket being swarmed by half a dozen hungry ostriches, was strapped with the caption "hen's party", prompting Jeffreys to mutter something that went unnoticed by all but the jester-in-chief.

In true Stefanovic style, Jeffreys had a good giggle at her own gag.

"What was that Sylvia?" Stefanovic said.

"Nothing," Jeffreys replied.

"No, go on," her future brother-in-law pressed.

Happy Friday...The TODAY presenters lost it over Jeffreys' joke.

"I was gonna say, it's not the first time there's been a pecker at a hen's party," Jeffreys said, eliciting looks of mock-shock from Lisa Wilkinson and Tim Gilbert and peals of laughter from Stefanovic.

"You know when you say it under your breath…" Wilkinson said.