Proponents of California's gay marriage ban filed notice of a pending appeal Thursday, a day after a federal judge struck down the law, Reuters reported.

The ruling by Chief U.S. District Judge Vaughn Walker says Proposition 8 violates the constitutional rights of gay and lesbian couples who wish to marry. The measure, narrowly approved by voters in 2008, put an end to gay weddings taking place in the state after the California Supreme Court legalized the institution.

After California officials refused to defend the law, a coalition of social conservative groups, including the Christian-based Alliance Defense Fund (ADF) and Protect Marriage, the sponsor of the measure, took over the reins.

The one-paragraph notice, which informs Walker that his ruling will be appealed, is largely a formality since supporters and opponents have said all along that they are prepared to take the case to the Supreme Court.

Walker has stayed his ruling until Friday, when he'll hold a hearing to determine if gay marriages can resume as the case is being appealed. Lawyers for the plaintiffs said they'll ask Walker to allow gay marriages to resume – despite their uncertain future – and will ask the appeals court to fast-track the case.