Comedian and actor Russell Brand
Comedian and actor Russell Brand has been accused of rape, sexual assaults and emotional abuse during a seven-year period at the height of his fame.
The allegations were made in a joint investigation by the Sunday Times, the Times and Channel 4's Dispatches, reports BBC.
Four women are alleging sexual assaults between 2006 and 2013.
Brand has denied the allegations and said his relationships have been "always consensual".
During the years covered by the allegations, Brand was a presenter for BBC Radio 2, Channel 4, and an actor in Hollywood films.
Other claims made as part of the investigation include allegations about Brand's controlling, abusive and predatory behaviour.
The investigation has been published on the Sunday Times website, while the Dispatches documentary, Russell Brand - In Plain Sight, will air at 21:00 BST on Channel 4.
Five women have made allegations against Brand as part of the investigation, Channel 4's head of news and current affairs Louisa Compton said. Four of the women allege sexual assault.
One woman alleges that Brand raped her against a wall in his Los Angeles home. She was treated at a rape crisis centre on the same day. The Times says it has seen medical records to support this
A second woman alleges that Brand assaulted her when he was in his early 30s and she was 16 and still at school. She alleges he referred to her as "the child" during an emotionally abusive and controlling relationship
A third woman claims that Brand sexually assaulted her while she worked with him in Los Angeles, and that he threatened to take legal action if she told anyone else about her allegation
The fourth woman alleged being sexually assaulted by Brand and him being physically and emotionally abusive towards her.
On Friday, Russell Brand released a video in which he denied "serious criminal allegations" he said were about to be made against him.
The actor and comedian said he had received letters from a TV company and newspaper, containing "a litany" of "aggressive attacks".
In the video, posted on YouTube and X, formerly known as Twitter, Brand said: "Amidst this litany of astonishing, rather baroque attacks are some very serious allegations that I absolutely refute.
"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, and 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."
Brand said he believed he was the subject of a "co-ordinated attack" and he was going to look into the matter because it was "very, very serious".
The BBC and Channel 4 have been approached for comment about the allegations.
Brand has hosted a number of radio and TV programmes for networks including Channel 4, MTV, Radio X and the BBC.
He started his career as a stand-up comedian in the early 2000s but got his big break a few years later as the host of Big Brother's Big Mouth on E4.
After his profile surged, Brand was cast in Hollywood films such as Forgetting Sarah Marshall, Get Him To The Greek and Arthur.