As lawyers for actor Charlotte MacInnes plan to appeal a failed defamation case outcome against Hollywood star Rebel Wilson, a solicitor says the judge's interpretations could be grounds for a retrial or a different verdict.

Actor Charlotte MacInnes originally claimed Wilson had defamed her in a series of social media posts that implied she was a liar and a sellout.

The Hollywood star was sued by Charlotte MacInnes, the lead actor in her directorial debut, over a series of Instagram stories.