Russell Brand's former personal assistant has come forward to reveal what she claims it was like working with the British comedian.

Helen Berger was Brand's PA in 2006, which was just before he started performing in big Hollywood films.

Berger claimed he would often walk around in just his underwear, something that she would call out if it happened now.

"He always only wore his underwear...his tighty-whities," she said.

"I don’t think today I would accept a boss only being in his underwear around me."

When she got the job to be his personal assistant, she said it was an exciting time.

"The only thing I knew about Russell is that I had watched the NME Awards a year or two before I got this interview," she recalled.

"At the NME Awards, Bob Geldof called him the C-word, haha. When I met Russell, I was like 'Oh this is weird and refreshing' and it really did seem like he was on his way up."

She added: "Russell was on a national comedy tour, he was writing a book, he had a weekly column in The Guardian, he had two shows - Big Brother’s Big Mouth, 1 Leicester TV."

However, she claims she quickly realised that he was very promiscuous.

Helen alleges she watched Brand and a friend once looked through photos of women that the comedian had slept with.

"As he's going through these pictures he gets to a picture of somebody I knew," she told Channel 4.

"It did something to me.

"It made me feel really sick to my stomach.

"These are women who aren't expecting to be shown to the dude's friends."

While she said that was a horrible experience, she said she was 'never worried' about the women he was sleeping with.

"I saw a lot of women knowing who he was, shagger of the year, willingly were walking into his bedroom and I never once thought that he was somebody that would rape anybody, or assault anybody, no, I didn't think so, as far as I knew, what could I possibly know when I wasn't there," she said.

In a joint investigation between the Channel 4 Dispatches programme and The Times, four women have claimed they were victimised by Brand between 2006 to 2013.

Some of the accusations include rape, sexual assault, and emotional and physical abuse.

Brand has hit back at the claims and denied them all.

"Amidst this litany of astonishing rather baroque attacks, are some very serious allegations that I absolutely refute," he said in a YouTube video.

"These allegations pertain to the time when I was working in the mainstream, when I was in the newspapers all the time, when I was in the movies. As I've written about extensively in my books, I was very, very promiscuous.

"Now, during that time of promiscuity, the relationships I had were absolutely always consensual. I was always transparent about that then, almost too transparent, and I'm being transparent about it now as well.

"And to see that transparency metastasised into something criminal that I absolutely deny makes me question, is there another agenda at play?"

LADbible has attempted to contact Russell Brand for an updated comment.