Claire Danes wasn't just keeping her pregnancy a secret from fans — she was also hiding it from her Homeland costars

By Dave Quinn
April 19, 2018 08:45 AM

Claire Danes wasn’t just keeping her pregnancy a secret from fans — she was also hiding it from her Homeland costars!

The 39-year-old actress, who is already mom to 5-year-old son Cyrus Michael Christopher with husband Hugh Dancy, dropped the surprise news that she is expecting her second child on Wednesday’s episode of The Howard Stern Show.

But it was during a visit to The Tonight Show later that day that Danes revealed she even kept the cast and crew of her hit Showtime series in the dark during the early days of her pregnancy. But being secretive wasn’t always easy.

“I was filming during the first trimester which is kind of my least favorite phase because you just feel horrible,” Danes told Jimmy Fallon. “You feel just rotten and you’re not allowed to say why.”

Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter.

Andrew Lipovsky/NBC/Getty

Exhaustion was the biggest problem Danes had to combat while the cameras were rolling. “I was filming quite a lot but just inadvertently falling asleep all the time. And it was embarrassing,” she admitted.

One particular nap still has Danes feeling regret. “I face-planted onto this crocheted bag in between takes,” she recalled. “It was time for my close up … and I sit up and I have this crocheted indentation on the side of my face. It looked like I had third-degree burns.”

“It was intense!” she continued. “And they were massaging my face. They had to take out the blow dryer. I halted production for a good half an hour. I just felt like an idiot. I was like, ‘No, I wasn’t up on a coke binge all night.’ Your body’s going through a lot!”

Danes is past that point now, of course. “I’m feeling good,” she raved. “I’m in the cruisy second-trimester period.”

“It’s just chilling in there,” she added of her baby-to-be. “It gets a little excited when I have a chocolate bar. It’s moving and kicking. I love that part. It’s like a firework show. And a little creepy. It’s like an alien being in there! I’m cohabiting!”

Claire Danes as Carrie Mathison and Elizabeth Marvel as Elizabeth Keane in HOMELAND (Season 6, Episode 12). - Photo: JoJo Whilden/SHOWTIME - Photo ID: HOMELAND_612_1775.R

Still, no matter how good she’s feeling, there are still moments her pregnancy makes it that much more challenging to do her job — like during a recent Additional Dialogue Recording session for Homeland where she was asked to mimic some “pretty intense breathing.”

“I just did a looping session and I was doing a lot of breathing and the baby did not like it,” she said. “It’s like, ‘I need two things from you and you are not providing one central thing! Oxygen would be nice right about now!’ I was like, ‘This is hazardous to the life growing inside of me!’ ”

Adam Nemser/StarTraks

RELATED VIDEO: Mom Talk: Mom Guilt

Danes and Dancy, 42, have been married since 2009.

On The Howard Stern Show, she told the radio host that she and Dancy had been hoping to expand their family. “This was planned,” she said. “We’ve been wanting another kid for a while, and it happened.”

Danes said she was going to keep the sex of the baby a secret, joking that she could name the baby after Stern — “Howardina” if it’s a girl.