The I'm A Celebrity star dropped in on Tuesday - and brought with her the autobiography of his former protege and friend Gordon Ramsay.
They have since fallen out and the book was sure to anger Marco.
Thatcher said: "Gordon says a lot about Marco Pierre White. When I knew I was coming tonight I thought I'd bring it with me and I'm waiting to see if he lives up to expectations."
She demanded he sign the book or a photo of himself but was angrily rejected. Marco blasted: "Stop seeking attention, have a bit more grace like your mother."
The chef commented to a colleague: "Her mother was great, I can't say much for her or her brother."
Meanwhile, sous chef Matt lost his temper with model and competitor Abbey. He labelled the girls' team "muppets" and complained: "I hate these f**kin' gobby bitches."
Hell's Kitchen continues tonight at 9pm on ITV1.