Phil Twyford was absent from the Prime Minister's caucus meeting Thursday morning where it's understood she disclosed details of her Cabinet reshuffle.
Newshub has been told Twyford, the Minister for Housing and Transport, was on pre-arranged leave. A spokesperson told Newshub he's giving a speech at the Planning Institute in Auckland.
Other ministers also absent were Finance Minister Grant Robertson, Minister for Agriculture Damien O'Connor, Social Development Minister Carmel Sepuloni, and Corrections Minister Kelvin Davis.
Meka Whaitiri was also a no-show.
Applause and singing could be heard from outside the meeting in Parliament.
Leaving the caucus meeting, Immigration Minister Iain Lees-Galloway - whose future in the role has been on shaky ground since the Karel Sroubek debacle - wouldn't give any insight into the reshuffle.
"All will be revealed this afternoon," Lees-Galloway told Newshub.
Health Minister David Clark also didn't give anything away.
Asked if she had just crushed any dreams, Prime Minister Jacinda Ardern responded: "Absolutely not, we will be making announcements at 3:15pm this afternoon".
Other MPs like Michael Wood, Ruth Dyson, and Louisa Wall said there had been "happy" and "good" vibes in the caucus room.