HBO’s ratings for “Girls,” I don’t know. I know I saw Kellan Lutz, Steve Buscemi, Anna Chlumsky, Spike Jonze and, through Zosia Mamet’s highlighted hanging hair, another 1,000 VIP freebees swarm their third season screening.

So fellow castmember Allison Williams, beautiful daughter of NBC’s Brian Williams of whom you may have heard, who gets most attention at home?

“All of us have careers. We’re all working. All talking about it. My little brother’s a sportscaster. Mom’s with Bloomberg radio. Even these days my father never made it about himself.”

A subzero freezing night wearing sleeveless armpit to armpit Dior, her coif, no homemade job, was a bejeweled bun by something named Renata. Not her TV character’s usual semiundressed look.

“When the show began I talked with people about doing sex scenes. But, since I was staying on their couch, my family took it in stride. They had plenty of time for preparation. I started slowly. I’d say, ‘Oh, there’s a scene that . . .’ Then I’d say, ‘That scene I told you about? Well, I did it today.’ So they had a long time to get adjusted to it.

“They know it’s not real. I’m not having actual sex. Everyone’s comfortable with this now but . . . truth is . . . I was nervous at the beginning.”

Lena Dunham, the show’s star and 27-year-old genius creator, also in sleeveless. Plus, gold spike heels and glittery Rochas gown: “I’ll try to keep this. I’m a little fat so not much for them to want it back because few others can wear it. Look, I haven’t weighed myself in two years. I’d rather just enjoy life.

“I work at night. Sometimes I go home, spew out an episode immediately. Sometimes it takes two, three weeks. Lots are my own go-to experiences. This season the characters are maturing. Same topic. Same intensity. But a different kind of raunch.

“One day I’d like to include a gay wedding. I’m hoping I’ll get invited to one so I have the experience.

“The fact is, now everybody tells me their sex stories. Happens all the time. They come up to me on the street. I listen — but, hey, if you’re on your way to brunch, you really don’t want to stop and listen to a story about fellatio.”

Top secret

No CEO or executive called to rebut my attacking United Airlines’ shoddy service. However, I’ve received furtive phone calls. Alluding to my comments, people whisper: “I’m anonymous. Can’t give my name.” What are they running over there? A gulag?

Cold-calling

A Manhattan escapee phoning a chilly New Yorker from his Palm Beach house: “It’s 50 degrees here today. So freezing cold that we don’t know what to do.”

‘Downton’ in Brooklyn

Dan Stevens, who in another life was Matthew the “Downton Abbey” Brit married to Lady Mary, now lives among us. Brooklyn. And watches each new installment like the rest of us . . . Michael J. Fox at “Kinky Boots” . . . Alan Aldridge (daughter Lily’s a Victoria’s Secret angel) marking a 45th anniversary of his Beatles Illustrated Lyrics Book with a first ever of his Beatles art calendar.

Livin’ well

America’s former onetime sportstar hotshot Yao Ming is living large in China. Owns Shanghai’s basketball team, lunches with pals in a private room in Shanghai’s art museum restaurant Kathleen’s. And his Range Rover has vanity plates. Number 58551, which translates to “I’m rich.”

Order up

Broadway-bound is a musical version of “Waitress,” a 2007 movie starring Keri Russell as an uhappily married server in the Deep South. The Weisslers, who made “Chicago” famous almost before Capone did, and whose rejuiced “Pippin” is so successful it repaid investors in eight months, will produce . . . Robert Morgenthau our former DA at Circo.

New owner of a just-bought East Side co-op: “Haven’t moved in yet and already my subzero refrigerator leaks, due to the blizzard our phones are down and the co-op board told me my maintenance is going up.”

Only in New York, kids, only in New York.