Julianna Marguilies for Marriage in N.Y.

The Good Wife star Julianna Margulies and husband Keith Lieberthal join the video series for marriage equality in New York from the Human Rights Campaign, saying that their understanding of "traditional marriage" includes everyone.

"We believe in traditional marriage," says the Golden Globe and Emmy Award-winning Margulies. "It's a lifetime commitment to the person you can't imagine life without."

Lieberthal continues, "A pledge to nurture and support them, through good and bad, without reservation."

"So let's strengthen traditional marriage by letting every New Yorker embrace this commitment to the person they love," says Margulies in the 30-second spot that premiered online Thursday.

The latest video in the New Yorkers for Marriage Equality series arrives as momentum for marriage equality continues to build in the state. Gov. Andrew Cuomo wants to see another vote on a bill by June, polls show growing popular support, and leading advocacy groups have joined forces in the new coalition, New Yorkers United for Marriage.

In the coming days, the coalition plans a media campaign to amplify poll findings revealing that a record 58% of New York voters support marriage equality. Preexisting efforts like the HRC video series will also continue, including outreach to everyday New Yorkers invited to film their own videos at locations around the state.

"We have enormous momentum in New York with super majority public support and a popular governor championing equality," said Brian Ellner, senior strategist for HRC in New York. "Julianna Margulies and Keith Lieberthal want all New Yorkers to be able to make a lifelong commitment to the person they love. That is what we're fighting for."

The New Yorkers for Marriage Equality campaign, which has appeared online and on the city's Taxi TV, features prominent New Yorkers to move viewers to lobby their state lawmakers. Other videos in the New Yorkers for Marriage Equality campaign so far have included Barbara Bush, daughter of former president George W. Bush; New York City mayor Michael Bloomberg; former mayors Ed Koch and David Dinkins; former police commissioner Bill Bratton and Rikki Klieman; Robert F. Kennedy Jr.; Joan Rivers; Whoopi Goldberg; Lucy Liu; Kyra Sedgwick and Kevin Bacon; Russell Simmons; Bill T. Jones; Julianne Moore; Ethan and Ryan Hawke; Christopher Meloni; Moby; Brent Ridge and Josh Kilmer-Purcell; Fran Drescher; Mark and Sunrise Ruffalo; chefs Mario Batali, David Chang, and Tom Colicchio; Jeanne Moutoussamy-Ashe; Kenneth Cole; John Slattery; and Daphne Rubin-Vega.