Olivia Munn shocks onlookers by cursing group at Las Vegas nightclub

Actress Olivia Munn is said to have shocked onlookers at a Las Vegas nightclub when she cursed at a group there.

Munn, 30, was at Pure nightclub in Caesars Palace Resort and Casino in Las Vegas enclosed in a VIP section with Ultimate Fighting Championship founder Dana White and supermodel Selita Ebanks.

A source revealed the leggy ladies, clad in similar red dresses, spent most of the evening "dancing and laughing". Munn was said to be "taking pictures with every person and having the best time".

But things took a turn for the worse when the Perfect Couples actress made her exit from the club.

The source said Munn approached a group of "about four others, both men and women", whom she had been seen with throughout the evening, and despite her previously sweet demeanour, "started yelling and swearing".

"You can go f- yourselves!" the New York Daily News quoted her as telling the group.

She added that her "career will go on", but the slack-jawed group she was addressing was "going to have to kiss peoples' asses for the rest of their lives!"

The source said the group had initially tried to calm the belligerent actress, but she was having none of it.

"I'm rich! I come from a well-off family," the source said the actress shouted.

After she was done with her tirade, she stormed off, leaving the group in silence and bystanders in shock.

A spokesperson for Munn said the actress' outburst was based off an earlier situation inside the nightclub where someone had tried to manhandle one of her friends.

"She's fiercely loyal to her friends, and screaming profanity to protect them is the least aggressive thing she could have done in the moment," he said.