And the gender of Olivia Wilde's baby is...

Actress Olivia Wilde took to Twitter on the weekend to sneakily reveal her unborn child’s gender.

In 140 characters, the Hillary Clinton supporter managed to simultaneously slam Donald Trump and reveal her baby’s sex.

The 32-year-old is expecting baby number two with fellow actor Jason Sudeikis, and announced she will be welcoming... A baby girl!

The mother-of-one shared a powerful video that the Democratic nominee posted to Twitter and wrote: “As someone who is about to have a daughter, this hits me deep in my core. #NeverTrump.”

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Titled Mirrors, the campaign features young women observing their bodies in mirrors while recordings of Trump saying sexist things plays over the top.

The ad urges Americans to think about whether this is the president they want their children growing up with.

Since Olivia posted the tweet, which clearly indicates whose side she’s on, it has received more than 3800 likes and been retweeted more than 1500 times.

Some fans agreed with the the director’s anti-Trump sentiment saying, “#Trump is consistently awful to women... Don't envy his female execs.”

Others couldn't disagree more and were surprised the feminist was voting for Hillary.

“Clinton has never been a positive female role model. Never has, never will be,” one person wrote.

“Are you voting for Hillary? I hope you're smarter than that but I'm not holding my breath,” another commented.

Some sat on the fence: “I wouldn't vote for either one. They're both terrible.”

Others looked past the Trump comment and couldn’t believe Olivia had just sneakily announced her baby’s sex in the same tweet.

“DAUGHTER????? OMGGGG,” someone wrote.

“Congrats on a girl!!!!!" another said.

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