Williams' two drivers admitted they were surprised to hear that they will have a new team boss within days.
Following the sale of the British team to Dorilton Capital, which has links to Prince William's brother-in-law James Matthews, it was announced on Thursday that Claire Williams and her father Sir Frank are stepping down.
"Nicholas and I found out from Claire this morning," team driver George Russell said at Monza.
"It's a sad day for us as a team, but we'll fight to represent the Williams name as best we can in the future."
Teammate Nicholas Latifi agreed: "I have to admit - I was surprised this morning.
"When it became clear that the team was going to be sold, I had in the back of my mind that something like this could happen. But I didn't expect it to happen so quickly."
The pair did not say who their new boss will be in a week's time at Mugello.
But Russell hinted that it might be someone new to Formula 1.
"He had some motorsport experience but not a huge amount in F1 and has not done too bad! So I don't think that is hugely important."