America’s largest gay rights group – Human Rights Campaign – has received a donation of $100,000 from Brad Pitt to propel the fight for same-sex marriage rights.

The Human Rights Campaign has claimed that Pitt promised to match contributions from other members for up to $100,000.

This rare political donation by Pitt was justified in an email to the organisation, where he claimed it was ‘unbelievable’ that people’s relationships will be put to vote on Election Day.

The Human Rights campaign has spent $8 million on LGBT rights in the last two years.