UPDATE: President Obama officially endorsed gay marriage, speaking to Robin Roberts on Wednesday. He said that "at a certain point I’ve just concluded that for me personally it is important for me to go ahead and affirm that I think same sex couples should be able to get married."
ORIGINAL STORY: President Obama is expected to address gay marriage in an exclusive ABC News interview with Robin Roberts on Wednesday.
Roberts plans to ask Obama about his position on the issue, ABC sources told The Huffington Post. The interview was quickly arranged on Tuesday, with Roberts leaving after Wednesday's "Good Morning America" for the 1:30 pm White House sit-down. It is expected to last twenty minutes.
A portion of the interview will be aired on "ABC World News" on Wednesday, but the network will announce any headlines made by the president immediately.
White House press secretary Jay Carney has been grilled for two days over President Obama's "evolving" position on same sex marriage following Vice President Joe Biden's comments on Sunday's "Meet the Press" that he was "absolutely comfortable" with two men or two women marrying and have the same rights as heterosexual spouses.
The White House announced at noon that there would be no White House briefing on Wednesday, only adding to the speculation that Obama would make news on the subject.
Roberts has interviewed Obama a few times previously, including landing his first interview after becoming president on Inauguration Day.
This photo released by ABC shows Diane Sawyer, left, and George Stephanopoulos during election night coverage early Wednesday, Nov. 7, 2012, from ABC News' Times Square Studios in New York. (AP Photo/ABC, Donna Svennevik)
NEW YORK, NY - DECEMBER 05: Journalist Christiane Amanpour poses for a photo during the premiere of 'In the Land of Blood and Honey' at the School of Visual Arts on December 5, 2011 in New York City. (Photo by Jemal Countess/Getty Images)
TAMPA, FL - AUGUST 28: Republican presidential candidate, former Massachusetts Gov. Mitt Romney's wife, Ann Romney (R) talks to news anchor Diane Sawyer on the floor before the start of the second day of the Republican National Convention at the Tampa Bay Times Forum on August 28, 2012 in Tampa, Florida. Today is the first full session of the RNC after the start was delayed due to Tropical Storm Isaac. (Photo by Chip Somodevilla/Getty Images)
This image released by ABC shows host Robin Roberts, center, with her sister Sally-Ann Roberts, right and ABC News' Diane Sawyer on "Good Morning America" Monday, June 11, 2012, after Robin Roberts announced she has been diagnosed with myelodysplastic syndrome, a blood and bone marrow disease once known as preleukemia. She says she will undergo chemo and a bone marrow transplant this year as "pretreatment" for the disease, which she says she has known about for several weeks. She says her sister is a great match for her. While she says she'll miss a day here and there, she'll remain on the air. (AP Photo/ABC, Ida Mae Astute)
DES MOINES, IA - DECEMBER 10: Moderators George Stephanopoulos and Diane Sawyer during the ABC News GOP Presidnetial debate on the campus of Drake University on December 10, 2011 in Des Moines, Iowa. Rivals were expected to target front runner Gingrich in the debate hosted by ABC News, Yahoo News, WOI-TV, The Des Moines Register and the Iowa GOP. (Photo by Kevork Djansezian/Getty Images)
NEW YORK, NY - NOVEMBER 18: Diane Sawyer (L) and Katie Couric attend Regis Philbin's Final Show of 'Live! with Regis & Kelly' at the Live with Regis & Kelly Studio on November 18, 2011 in New York, New York. (Photo by Neilson Barnard/Getty Images)
NEW YORK, NY - NOVEMBER 09: Geraldo Rivera, Erica Rivera, Diane Sawyer and Bob Woodward attend 2011 Stand Up for Heroes at the Beacon Theatre on November 9, 2011 in New York City. (Photo by Donna Ward/Getty Images)
FILE - This Aug. 20, 2012 file photo released by ABC shows co-host Robin Roberts during a broadcast of "Good Morning America," in New York. Roberts underwent a bone marrow transplant earlier this month and recorded a message to fans from a hospital bed that she could "feel the love." ABC News' website encourages people to "follow Robin's journey." (AP Photo/ABC, Donna Svennevik, file)
This image released by ABC shows "Good Morning America" co-host Robin Roberts, right, speaking with a fan outside on the popular morning show on Thursday, Aug. 30, 2012 in New York. Roberts has said goodbye to "Good Morning America," but only for a while. The "GMA" anchor made her final appearance Thursday before going on medical leave for a bone marrow transplant. Roberts' departure was first planned for Friday, but she chose to exit a day early to visit her ailing mother in Mississippi. In July she first disclosed that she has MDS, a blood and bone marrow disease. She will be hospitalized next week to prepare for the transplant. The donor will be her older sister, Sally-Ann Roberts. (AP Photo/ABC, Fred Lee)
"Good Morning America" anchors, from left, George Stephanopoulos, Robin Roberts and Lara Spencer attend the Be the Match bone marrow registry held at ABC News, on Tuesday, June 26, 2012 in New York. (Photo by Charles Sykes/Invision/AP)
This image released by ABC shows Lara Spencer , left, ABC News President Ben Sherwood, center, and George Stephanopoulos swabbing themselves at a bone marrow registry drive at ABC News headquarters in New York on Tuesday, June 26, 2012. The national bone marrow donation registry Be The Match reported Tuesday that the rate of new registrants has more than doubled since the "Good Morning America" anchor Robin Roberts announced on June 11 that she has MDS, a blood and bone marrow disease. (AP Photo/ABC, Lou Rocco)
This image released by American Broadcasting Companies shows Barbara Walters answering a phone to take donations for victims of Superstorm Sandy during "Good Morning America," Monday, Nov. 5, 2012 in New York. Walters made a contribution of $250,000 to the American Red Cross and GMA co-host George Stephanopoulos followed suit with a donation for $50,000. (AP Photo/American Broadcasting Companies, Lou Rocco)
This image released by American Broadcasting Companies shows, from left, ABC News' Chris Cuomo, actor Tony Danza, actor Andre Braugher, Barbara Walters, Cynthia McFadden and David Novarro manning phones to take donations for victims of Hurricane Sandy during "Good Morning America," Monday, Nov. 5, 2012 in New York. Walters made a contribution of $250,000 to the American Red Cross and GMA co-host George Stephanopoulos followed suit with a donation for $50,000.(AP Photo/American Broadcasting Companies, Lou Rocco)
In this photo provided by ABC News New Jersey Gov. Chris Christie responds to questions by ABC's "This Week" host George Stephanopoulos at the ABC studio in New York Sunday, Sept. 30, 2012. Christie, who also appeared Sunday on another talk show, predicted that Romney will do "extraordinarily well" in the upcoming debate Wednesday night and that after that "this whole race is going to be turned upside down." (AP Photo/ABC News, Lou Rocco)
In this image released by ABC, guest host Katie Couric, second left, joins co-hosts Josh Elliott, left, George Stephanopoulos, third left, Lara Spencer and Sam Champion, right, the cast of the ABC "Good Morning America" television program, in New York, Tuesday, April 3, 2012. Viewers who fantasized about potshots between Sarah Palin and Katie Couric were disappointed Tuesday morning. Both women did their own thing in their respective morning-show guest spots. (AP Photo/ABC, Ida Mae Astute)
NEW YORK, NY - APRIL 11: News anchor George Stephanopoulos attends the Hollywood Reporter celebration of 'The 35 Most Powerful People in Media' at the Four Season Grill Room on April 11, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)