Alexander Skarsgard walked the red carpet at the “Diary of a Teenage Girl” premiere wearing a sparkly gold dress, a sky-high blonde wig and a full face of makeup.

Skarsgard — who stars opposite Kristen Wiig and Bel Powley in the 1970s-set pic as a 35-year-old who has an affair with the 15-year-old daughter (Powley) of his girlfriend (Wiig) — didn’t offer an explanation for his appearance at the premiere, but later told BuzzFeed, “We shot the movie in San Francisco; Mari the director is from San Francisco and she wanted to do a big screening for friends and family who shot the movie there … We had a bunch of drag queen [sic] on the crew. Our first AD was Cousin Wonderlit, the casting director for the extras was Lady Bear, who is a legendary drag queen in San Francisco, and we had Peaches Christ. We had a small group and we all became really close, and you know, dear friends of mine. And Mari wanted them to host the screening at the Castro and do a number from the Rocky Horror Picture show before and do a big fun drag queen after party … I didn’t want to be excluded from the fun. So I asked if there was any way I could come in drag and they were nice enough to say yes.”

Skarsgard admitted that his inspiration for the look was “Charlie’s Angels” star Farrah Fawcett. “I said I want something glamorous like Farrah Fawcett. And they went for it. They made this dress, a wig, and fake tits with really nice nipples, and high-heeled shoes. The whole thing.”

As for the name of his glamorous alter-ego? “Lady Libido Lushbody.” RuPaul would be proud.

The Swedish actor is no stranger to drag. He played a statuesque transvestite in Swedish indie drama “Kill Your Darlings” in 2006.

“Diary” was a Sundance favorite, favorably reviewed for its performances. According to Variety‘s review, “Skarsgard makes Monroe so easygoing and likable you sometimes forget that his passivity is actually a contemptible willingness to let his libido make decisions by default.”

“Diary of a Teenage Girl” bows in theaters Aug. 7.

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