Actress Natalie Portman and Benjamin Millepied have urged President Barack Obama to support marriage equality.

“Natalie Portman and her fiance, Benjamin Millepied, are in love, and believe all loving couples should be able to share in the freedom to marry without discrimination. That's why today they are joining the more than 100,000 people on Freedom to Marry's Say, 'I Do' Open Letter calling on President Obama to do the right thing and become part of America's majority for marriage,” said Freedom to Marry President Evan Wolfson in a statement.

Freedom to Marry'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.

Caroline Kennedy, the daughter of former President John F. Kennedy and First Lady Jacqueline Bouvier Kennedy, became the 100,000th signer to the letter last month.

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.