The 35-year-old actress made a name for herself through roles in the US television show The Office and comedy movie Bridesmaids, as well as critically-acclaimed Netflix series Unbreakable Kimmy Schmidt. Ellie plays the lead in the series, which tells the story of a young women getting used to the world after being rescued from a doomsday cult.

Ellie admits in a new interview she constantly worries about her portrayal of Kimmy on screen, but that's not a new experience for her.

"I'm a natural worrier," she told Britain's Stylist magazine. "I worry about the most mundane stuff. Yesterday was my sister’s birthday and I was printing out an old photo of her to make a card and the cartridge wasn’t working – honestly, how are you still listening to this? – and I was like, ‘I can’t go and get one because there’s no gas in the tank but I can’t wait… maybe my husband can bring one home but if not, her birthday is going to be ruined!’ I catastrophize."

Ellie works with Tina Fey on Unbreakable Kimmy Schmidt, with the comedienne having co-created the series. Having the chance to see someone like Tina at work is something Ellie is grateful for, and she is trying to pick up tips on how not to worry about things from her boss.

"She (Tina) is someone that gets things done," Ellie said. "I hate it when people are like, 'How does a woman do it all?', so I don’t mean it that way, just that she is so accomplished. Sometimes people ask what’s the best advice she’s ever given? She doesn’t dish out advice every day at 11am but in the first week I said (to her), 'Does this seem too much like Erin (from The Office)?' And all she did was look at me and say, 'No'. And I was like, 'Oh, that’s the answer'. She never appears worried."

Another female comedian Ellie looks up to is Amy Schumer. The 34-year-old has become a household name through her show Inside Amy Schumer, and Ellie admires her ability to not care about other people's opinions.

"That is so foreign to me, I could never not care about what people thought," Ellie continued. "I’ve met her a few times and I could see that. And it certainly comes across in her work. She deserves every second of praise she is getting, I love her."