Starr has strenuously denied claims by a woman named Karen Ward that he "groped and propositioned" her in Savile's dressing room back in the 1970s when she was aged 14.
Speaking on today's (October 9) edition of ITV1's This Morning via a live phone link, Starr's partner Sophie Lea branded the allegations "absolutely nonsense".
"I know Freddie myself, I've known him for a long time before we even got together, and when I was working with him on stage never once did he make any advances towards me," she stated.
"He would never ever grope a girl or a woman regardless of their age - he has never done it in his life and he never would do it."
She continued: "It's horrendous. To be falsely accused of something that he has not done is making him so ill.
"He had a quadruple bypass last year and this kind of stress is not good for him. It's absolutely disgusting that he has to go through this and be prosecuted."
Lea also addressed video footage proving that Starr appeared on a show hosted by Savile in 1974, something that the 69-year-old had previously not admitted.
She argued: "He did hundreds, if not thousands, of TV appearances throughout his career... he told reporters that he could not recall being on a Jimmy Savile show, and it's like me asking you what was you doing 40 years ago today? You couldn't remember what you've done."
Lea explained that Starr only took out an injunction, which was subsequently overturned, because they had been told about the allegations at the "very last minute" and wanted to "stop anything coming out without any proof".
She also confirmed that the couple have been working with private investigators, who have a "lot of information already... that makes very interesting reading into these allegations".