OLYMPIA, Wash. (AP) — Gov. Chris Gregoire has signed into law a measure that legalizes same-sex marriage in Washington state, which now joins several other states that allow gay and lesbian couples to wed.

Gregoire and Secretary of State Sam Reed certified the election on Wednesday afternoon, as they were joined by couples who plan to wed and community activists who worked on the campaign supporting gay marriage. The law doesn’t take effect until Thursday, when gay and lesbian couples can start picking up their wedding certificates and licenses at county auditors’ offices. King County, the state’s largest and home to Seattle, and Thurston County, home to the state capital of Olympia, will open the earliest, at 12:01 a.m. Thursday, to start issuing marriage licenses.