Paris Hilton

The awards were attended by Hilton just hours before she was jailed for violating probation on an alcohol-related drink-driving conviction.

"I said some very hardcore jokes about her.... Paris, I am really sorry," Silverman said.

Hilton responded by saying she was "shocked... and pleasantly surprised".

She added: "[Silverman] was so genuine and so sweet and it really moved me. I felt emotional hearing it and I could tell she really did mean what she said when she was apologising.

"Thank you, I really, really appreciate you doing that."

Hilton and Zylka, who have dated for two years, became engaged at the weekend while on a skiing trip.

And the ring - displayed in a photo posted on Hilton's Twitter account - is on the large side, to say the least.

Hilton wrote: "I have never felt so happy, safe and loved. He is perfect for me in every way and showed me that fairytales really do exist!"

The couple were on a trip to Aspen, Colorado, when Zylka got down on one knee and popped the question.

Zylka, who starred in US drama The Leftovers, first met Hilton eight years ago.