Ellie Kemper talks pregnancy: 'I'm YouTubing how to change a diaper'

EXCLUSIVE: Ellie Kemper Opens Up About Pregnancy, Learning How To Change a Diaper Online

Ellie Kemper says she can't believe she's about to have a baby.

ET caught up with the star at the premiere of her new movie, The Secret Life of Pets, at the Lincoln Center in New York City on Saturday, where she gushed about her impending arrival -- and confessed just how much she still has to learn before the little one gets here.

WATCH: Ellie Kemper Adorably Announces She's Pregnant With Her First Child

The 36-year-old actress revealed that her baby is due in August, but still hasn't wrapped her head around the idea that she'll soon be a mom. "How do you anticipate what's going to happen?" she asked ET's Jen Peros on the red carpet. "We're just going to take it one day at a time. I don't know what I'm doing. So, [I am] very confident in my ability," she joked.

The Unbreakable Kimmy Schmidt star looked absolutely adorable at the premiere in a black floral dress and matching black flats.

"This is a great dress for pregnancy purposes, I have to say. It's very forgiving," she told ET, before adding that in this stage of her pregnancy, she's having a harder time getting in sleep.

Kemper admittedly still has a lot to learn, but she's got a bit of time on her side to prepare... or entertain other hobbies at home.

"Ice cream, making lists. I love a list," the star said, when asked how she'll be spending her downtime. "I'm not good at checking the items off the list, but I'm good at putting the items on the list. I guess reading -- reading the newspaper. I've been known to. And errands -- I love errands. They're so satisfying because they end."

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Ellie Kemper
NEW YORK, NY - MAY 18: Actress Ellie Kemper attends the 19th Annual Webby Awards on May 18, 2015 in New York City. (Photo by Brian Ach/Getty Images for Webby Awards)
WEST HOLLYWOOD, CA - JANUARY 13: Actress Ellie Kemper attends ELLE's Annual Women in Television Celebration on January 13, 2015 at Sunset Tower in West Hollywood, California. Presented by Hearts on Fire and Olay. (Photo by Michael Buckner/Getty Images for ELLE)
PASADENA, CA - JANUARY 07: Producer and co-writer Tina Fey (L) and Ellie Kemper (R) speak about the 'The Unbreakable Kimmy Schmidt' during the Netflix TCA Press Tour at Langham Hotel on January 7, 2015 in Pasadena, California. (Photo by Mark Davis/Getty Images for Netflix)
BEVERLY HILLS, CA - JANUARY 11: Actress Ellie Kemper attends the 72nd Annual Golden Globe Awards at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
Actress Ellie Kemper arrives at the MTV Movie Awards at Universal Studios, in Los Angeles, California, on June 3, 2012. AFP PHOTO / JOE KLAMAR (Photo credit should read JOE KLAMAR/AFP/GettyImages)
WEST HOLLYWOOD, CA - MARCH 02: Actress Ellie Kemper attends the 2014 Vanity Fair Oscar Party hosted by Graydon Carter on March 2, 2014 in West Hollywood, California. (Photo by Pascal Le Segretain/Getty Images)
CULVER CITY, CA - MARCH 16: Ellie Kemper and Angela Kinsey arrives at 'The Office' series finale wrap party at Unici Casa Gallery on March 16, 2013 in Culver City, California. (Photo by Valerie Macon/Getty Images)
LOS ANGELES, CA - DECEMBER 16: Actress Ellie Kemper speaks onstage during 'VH1 Divas' 2012 at The Shrine Auditorium on December 16, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
NEW YORK, NY - MAY 12: Ellie Kemper attends the 2014 NBC Upfront Presentation at The Jacob K. Javits Convention Center on May 12, 2014 in New York City. (Photo by Slaven Vlasic/Getty Images)
BEVERLY HILLS, CA - MARCH 27: Actress Ellie Kemper arrives at Valentino Rodeo Drive Flagship store opening on March 27, 2012 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
HOLLYWOOD, CA - MARCH 13: Actress Ellie Kemper arrives at the Premiere Of Columbia Pictures' '21 Jump Street' at Grauman's Chinese Theatre on March 13, 2012 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
HOLLYWOOD, CA - FEBRUARY 26: Actress Ellie Kemper arrives at the 84th Annual Academy Awards held at the Hollywood & Highland Center on February 26, 2012 in Hollywood, California. (Photo by Michael Buckner/Getty Images)
WESTWOOD, CA - JULY 10: Actress Ellie Kemper attends the premiere of Columbia Pictures' 'Sex Tape' at Regency Village Theatre on July 10, 2014 in Westwood, California. (Photo by Christopher Polk/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 21: Actress Ellie Kemper arrives at the 14th Annual Costume Designers Guild Awards With Presenting Sponsor Lacoste held at The Beverly Hilton hotel on February 21, 2012 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
WESTWOOD, CA - APRIL 28: Actress Ellie Kemper arrives at the Premiere of Universal Pictures' 'Bridesmaids' at the Mann Village Theatre on April 28, 2011 in Westwood, California. (Photo by Michael Buckner/Getty Images)

And while we all can't wait for season 3 of Unbreakable Kimmy Schmidt, Kemper revealed she'll have a little time off after her baby is born before going back to work in the fall. "There will be some downtime for me to raise this baby. To swaddle it," she said. "That's what they tell me...I'm like YouTubing how to change a diaper."

The Secret Life of Pets hits theaters on July 8.

EXCLUSIVE: 'Unbreakable Kimmy Schmidt' Stars Ellie Kemper and Tituss Burgess Swoon Over Season 2

While Kemper couldn't stop talking about her impending arrival, her Secret Life of Pets co-star Jenny Slate was equally excited on the red carpet, gushing about new boyfriend Chris Evans, who accompanied her to the premiere. See more in the video below.

EXCLUSIVE: Jenny Slate Gushes Over Chris Evans: 'I Got My Dream 7th Grade Boyfriend'

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