Comedian James Corden and Sir Patrick Stewart became involved in a bizarre on-stage spat at the Glamour Awards on Tuesday.
Sir Patrick criticised Corden - host of the event - for standing with his hands in his pockets, adding: "From where I was sitting, I could see your belly."
Corden responded: "You could see my belly. I can see you dying right now."
The pair continued to trade insults, and several prize-winners remarked on the quarrel as they accepted awards.
After the show, Corden said: "I found it quite disappointing. You should ask him about it but I'm certain he's left."
Sir Patrick presented the film actress of the year prize to Avatar star Zoe Saldana.
Accepting her award, she said to Corden: "I like your belly but I'd like to see Sir Patrick Stewart dying on stage any day."
Corden then said: "I feel bad for people who haven't seen my belly."
To huge applause, the Gavin and Stacey star lifted his T-shirt, revealing his tummy.
Referring to Sir Patrick, he said: "OK can we get a taxi really quickly please. There's an old man going home."
Several stars commented on the verbal tussle.
Nowhere Boy actor Aaron Johnson said: "I love your belly. That was intense. I didn't know where to look."
Singer Duffy told the crowd she thought Corden was doing a "wonderful job" and called him "highly entertaining".
Meanwhile, Girls Aloud singer and X Factor judge Cheryl Cole was named woman of the year at the event, which took place in central London.
The star, who recently announced she was divorcing her footballer husband Ashley Cole, said: "Four or five years ago, I'd never dreamt I'd be here amongst so many glamorous women.
"One person I definitely have to thank is my dentist. So thank you very much."
Among the other winners were The One Show host Christine Bleakley, who won presenter of the year, best TV personality went to Dannii Minogue and Florence and the Machine took band of the year.
There were also trophies for Lily Allen, Ruth Jones, Billie Piper, Nicole Richie, Fearne Cotton, Alexandra Burke and Yoko Ono who won an outstanding contribution award.
The winners were voted for by readers of Glamour magazine.