Illinois Attorney General Lisa Madigan's office on Friday filed a notice saying it will support two legal challenges to the state's gay marriage ban.

According to The Chicago Tribune, the notice, filed in Cook County Circuit Court, said Madigan's office will “present the court with arguments that explain why the challenged statutory provisions do not satisfy the guarantee of equality under the Illinois Constitution.”

The ACLU of Illinois and Lambda Legal are representing more than two dozen gay and lesbian couples who wish to marry in Illinois but are unable because state law defines marriage as a heterosexual union.

The suits, filed on Wednesday, come one year after Illinois legalized civil unions for gay couples and two weeks after President Barack Obama, a former Illinois senator, endorsed gay marriage.

The suits claim that Cook County Clerk David Orr's refusal to issue marriage licenses to gay couples violates their rights to due process and equal protection under the Illinois Constitution.

Orr has said he supports gay marriage.