The 35-year-old actress announced she and husband Michael Koman are expecting their first child during an appearance on The Tonight Show Starring Jimmy Fallon on Wednesday night (13Apr16).

"I have big news! I’m pregnant!" a beaming Ellie told Jimmy, who was quick to greet the baby.

"I can’t wait to see the show! Your mom is really talented!" Jimmy laughed.

Ellie was pregnant throughout filming the second season of her hit Netflix show Unbreakable Kimmy Schmidt. But she insists the pregnancy only really became an issue for shooting at "the very end".

"We had a table read, and my character is supposed to be on a rollercoaster...," Ellie grimaced. "It was still very early on, but I felt like a pregnant lady on a rollercoaster was not ideal so I had to tell my boss, Tina Fey. She knows every secret. I told her before I told my mom."

After telling Tina, the pair came up with a plan to hide the pregnancy from her cast members and crew on the set - telling everyone she had a back injury which meant she couldn't go on the rollercoaster. However, this ended up being harder to pull off than they originally thought.

"I could not act like I had a back injury," Ellie laughed. "I’m an actress, presumably. It was so (hard). Someone asked, ‘What’s wrong?’ and words escaped me. I’m like, ‘I sprained my spine.’ You can’t sprain your spine! You can’t do that!

"I kept forgetting I had (a back injury) so I kept doing things someone with a back injury can’t do. They’d say ‘Lunch!’ and I’d like leap up and do cartwheels to catering. You’re not supposed to do that!”

The second season of Unbreakable Kimmy Schmidt premieres on Netflix on 15 April (16).