Around 70 MPs have signed a letter urging the government to extradite Julian Assange if Swedish authorities request it.
The letter, which has been sent to home secretary Sajid Javid was shared on Twitter by Labour's Stella Creasy.
"Tonight over 70 parliamentarians stand with victims of sexual violence, and are calling on both the home secretary and the shadow home sec to urge them both to be champions of action to ensure Julian Assange faces Swedish authorities and is extradited there if they so request," she wrote alongside the letter.
"We do not presume guilt, of course, but we believe due process should be followed and the complainant should see justice be done.
"We urge you to stand with the victims of sexual violence and seek to ensure the case against Mr Assange can now be properly investigated."
WikiLeaks co-founder Assange, 47, is facing rape and sexual assault allegations in Sweden.
In May 2017, Sweden's top prosecutor dropped the long-running inquiry into a rape claim against Assange, which he has always denied.
But his arrest prompted the lawyer for a Swedish woman who alleged she was raped by Assange during a visit to Stockholm in 2010 to say they wanted the case reopened.