California prosecutors on Wednesday dropped domestic violence charges against Justin Roiland, who created the Cartoon Network animated series Rick and Morty and who provided the voices of the show's two title characters.

Orange County District Attorney's spokeswoman, Kimberly Edds, said the two felony counts involving a former girlfriend were dropped, "due to a lack of sufficient evidence beyond a reasonable doubt".

Mr Roiland had been awaiting trial on charges of corporal injury and false imprisonment by menace, fraud, violence or deceit against the woman, who he was living with at the time. She was not identified in court documents.

The charges dated to May, 2020, but they apparently went unnoticed by media outlets until NBC News reported on them in January of this year.

Following the charges being dropped, Mr Roiland released a statement on Twitter saying he had, "always known that these claims were false" and "never had any doubt that this day would come".

"I'm thankful that this case has been dismissed but, at the same time, I'm still deeply shaken by the horrible lies that were reported about me during this process," he posted.

He added that he was "disappointed that so many people were so quick to judge without knowing the facts, based solely on the word of a bitter ex trying to bypass due process and have me 'cancelled'."

After the original charges became public knowledge in January, Rick and Morty broadcasters Adult Swim and Cartoon Network cut ties with Mr Roiland and said they would recast the roles he voiced.

Meanwhile, 20th TV Animation and Hulu Originals — which produce two other animated series that Mr Roiland worked on — did the same.

The companies declined comment on Wednesday.

In his tweet, Mr Roiland said he was "determined to move forward and focus both on my creative projects and restoring my good name".

AP/ABC