Comedian Joan Rivers is thrilled with CNN anchor Anderson Cooper's announcement that he is gay.

The 45-year-old Cooper discussed his sexual orientation for the first time in a lengthy e-mail published Monday on Andrew Sullivan's blog The Dish, which is hosted by The Daily Beast.

“The fact is, I'm gay, always have been, always will be, and I couldn't be any more happy, comfortable with myself, and proud,” Cooper wrote.

“I am thrilled that Anderson Cooper finally came out,” Rivers, 79, told The Huffington Post, “because this explains why he never tried to date me. I saw him as the perfect package. I would have loved Gloria Vanderbilt as a mother-in-law. This explains everything.”

Rivers also made a joke about Tom Cruise and Katie Holmes' divorce: “She gets to keep the mansions and Tom gets the clothes!”

Cooper, who had long been rumored to be gay, received support for coming out from Ellen DeGeneres, Neil Patrick Harris and Kelly Ripa, to name a few.

(Related: Kathy Griffin: For years I talked around Anderson Cooper being gay.)