Joan Rivers calls President Obama gay, says Michelle Obama isa 'tranny'.

You can count on Joan Rivers to say something controversial, even when asked about a good deed.

The comedian called President Obama gay and the First Lady a "tranny" during an on street interview filmed earlier this week.

The 81-year-old was asked about officiating a gay wedding in  her New York City book signing Monday, followed by a question about whether she thinks the U.S. will first see a gay president or woman president.

"We already have it with Obama, so let's just calm down," the TV host responded.

Before walking away from the reporter, Rivers said "You know Michelle is a tranny." When asked to confirm her eyebrow-raising statement, she said, "A transgender. We all know. It's okay."

The octogenarian has a history of making controversial remarks, including slamming stars ranging from Adele to Miley Cyrus to Lindsay Lohan. Rivers recently claimed that she was being sued by "Twilight" actress Kristen Stewart for comments she made in her book, "Diary of a Mad Diva," about Stewart's affair with a married man.