President-elect Donald Trump isn't exactly popular with the celebrity set.

So, it's no surprise that some celebs have taken to Twitter to react to Friday's inauguration festivities -- some to express dismay, some to praise Hillary Clinton and some to offer words of hope for the next four years.

Here's what celebrities are saying about the inauguration.

Scott Baio

Credit: Getty Images

Scott Baio, one of Trump's few celebrity backers, tweeted a picture of himself at the inauguration and added: "We are ready. Proud to be an American! #Trump #Inauguration"

Chris Rock

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The comedian tweeted an image with the words: "Don't forget to set your clocks back 300 years tonight."

Conan O'Brien

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"Donald Trump's inauguration is expected to be the most costly in US history. And that's not even factoring in the money," Conan O'Brien tweeted.

Chrissy Teigen

Credit: Getty Images / John Sciulli

"my favorite thing is trump supporters saying the crowds are low because they all HAVE JOBS, as they tweet, nonstop, from twitter," Chrissy Teigen tweeted.

John Legend

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"The last 2 inaugurations were very crowded. This one is so... roomy," John Legend tweeted.

Zoe Saldana

Credit: Getty Images / Frazer Harrison

"I'm trying to be a respectful diligent American rt now but as I start to watch this inauguration- Regression is the word that comes to mind," Zoe Saldana tweeted.

Olivia Wilde

Credit: Getty Images/Mike Coppola

"Stop telling me to 'get over it'. Get UNDER it. He works for US. The democratic process is constant. Stay informed, stay engaged, speak up," Olivia Wilde tweeted.

Elizabeth Banks

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"I made a appointment at the DMV this morning. That's where I'll be. The DMV. #AlreadyGreat,"

Shonda Rhimes

Credit: Getty Images/Angela Weiss

"Maturity, grace and oh boy, is she going high when they went low," she tweeted, in reference to Hillary Clinton's tweet about attending the inauguration.

Lena Dunham

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"Have you seen her all in gold? Like a queen in days of old She shoots colors all around Like a sunset going down Have you seen a lady fairer? #whyimarch," Lena Dunham, who told her followers she plans to attend the Women's March on Washington, posted a photo collage of Hillary Clinton to her Instagram the night before Trump's inauguration.

Madonna

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"He's actually doing us a great service, because we have gone as low as we can go. We can only go up from here, so what are we going to do? We have two choices, destruction and creation. I chose creation," Madonna said during an event at the Brooklyn Museum on Thursday night.

Spike Lee

Credit: Getty Images / Pascal Le Segretain

"January 20th In Da Year Of Our Lawd Two Thousand and Seventeen A Date Which Will Live In Infamy. This Is The Joint I Will Be Listening To All Day. Stevie Wonder's HEAVEN HELP US ALL," Spike Lee wrote on Instagram alongside a photo of himself wearing an Obama shirt.

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