A lawsuit filed Monday on behalf of four gay and lesbian couples challenges the constitutionality of Arizona's gay marriage ban.

Arizona voters in 2008 approved Proposition 102, which limits marriage to heterosexual couples, two years after rejecting Proposition 107, which sought to prohibit gay couples from marriage, civil unions and possibly domestic partnerships.

“I think most people expect that this issue will eventually be decided by the U.S. Supreme court,” attorney Shawn Aiken, who is representing the couples, told KTAR Radio.

Named defendants include Governor Jan Brewer and Attorney General Tom Horne.

In a landmark decision handed down in June, the Supreme Court struck down a key provision of the Defense of Marriage Act (DOMA), which led to federal recognition of the legal marriages of gay couples. The ruling prompted a flurry of legal filings throughout the nation. And like most of those challenges, Monday's lawsuit relies heavily on the court's opinion.

“Like the offending provision of DOMA (Section 3), Arizona law imposes inequality on same-sex couples in violation of the U.S. Constitution,” the lawsuit states. “The text of Article 30, section 1 of the Arizona Constitution, which defines marriage as the 'union of one man and one woman,' mirrors the text in Section 3 of DOMA that was stricken as unconstitutional by the Supreme Court in Windsor.”

Plaintiffs in the suit include three male couples and one female couple. Two of the couples have adopted children.