Illinois Governor Pat Quinn has reiterated his support for gay marriage.

Appearing on the WBEZ radio, Quinn said he supports legalizing the institution in Illinois.

Illinois state Representative Greg Harris, who is openly gay, filed a bill in the spring which would legalize such unions. The earliest lawmakers could take a vote on it is during the upcoming fall session.

“I do favor marriage equality. When that bill comes before the legislature I hope it passes and if it gets to my desk, I'll sign it,” said Quinn.

Quinn came out in favor of marriage equality in May, following President Barack Obama's endorsement.

The democrat signed a law establishing civil unions for gay and lesbian couples in Illinois last year.

Supporters have also filed a lawsuit in federal court challenging the state's ban on equal marriage rights for gay couples.

(Related: Calls for Illinois Judge Sophia Hall to recuse herself from gay marriage case.)