Caroline Kennedy, the daughter of former President John F. Kennedy and First Lady Jacqueline Bouvier Kennedy, has urged President Barack Obama to support marriage equality.

“Falling in love, getting married, and building a family is part of the American dream,” said Kennedy, 53, in a statement. “I believe that all Americans, including committed gay and lesbian couples, should have the opportunity to pursue that dream.”

Kennedy, who joined Obama on the campaign trail in 2008, became the 100,000th signer to Freedom to Marry's open letter to the president.

The group's Say I Do campaign launched in March with the support of actors Anne Hathaway, Jane Lynch, Martin Sheen, Lily Tomlin, Eric McCormack and Portia DeGeneres, musicians Melissa Etheridge, Mya and Rufus Wainwright, playwright Tony Kusher and studio executive David Geffen. Also included are social media titans Jack Dorsey, creator of Twitter, and Chris Hughes, co-creator of Facebook, and NFL athletes Brendon Ayanbadejo of the Baltimore Ravens and Scott Fujita of the Cleveland Browns.

“We're honored that Caroline Kennedy has singed on to Freedom to Marry's Say I Do campaign,” said Freedom to Marry's Sean Eldridge. “A growing chorus of voices is calling on the president to complete his journey and join the majority of Americans who support the freedom to marry.”

Obama has said he personally supports government recognition of gay unions but not marriage. However, he recently suggested that gay marriage might be on his second term agenda.