Gay marriage supporters in New York will lobby lawmakers for its legalization at Monday's lobby day.

More than 1,200 supporters are expected to attend gay rights group Empire State Pride Agenda's annual Equality and Justice Day in Albany.

“With the leadership of a historically popular governor, an Assembly that has repeatedly voted in support of this agenda and rapidly increasing statewide momentum, this year marks the most dynamic opportunity yet for LGBT New Yorkers and their allies to tell their stories directly to legislators,” the group said in a statement.

Lieutenant Governor Robert Duffy, and openly gay lawmakers Senator Thomas Duane and Assemblyman Daniel O'Donnell will address the crown at the Empire State Plaza Convention Center. Duane and O'Donnell have carried gay marriage bills in the past. A Statehouse rally begins at 1PM.

A 2009 Democrat-controlled Senate rejected the legislation by a wide margin. Supporters are counting on Governor Andrew Cuomo's endorsement to help get the legislation approved in the six weeks remaining in the legislative session.

Senator Ruben Diaz Sr., the Senate's most vociferous opponent of marriage equality, and the National Organization for Marriage (NOM) will rally against the yet-to-be-introduced gay marriage bill at a Sunday rally in the Bronx.