Buy Elizabeth Olsen and Robbie Arnett’s 6 Favorite Children’s Books

Elizabeth Olsen can now officially add “children’s book author” to her resume.

The Marvel Cinematic Universe actress and star of “Doctor Strange in the Multiverse of Madness” has published a new children’s book, “Hattie Harmony: Worry Detective,” which she co-wrote with her husband, musician Robbie Arnett.

Illustrated by Marissa Valdez, the book tells the story of Hattie Harmony, a cat who helps her friends manage their feelings – and along the way discovers how to help herself.

The picture book “Hattie Harmony: Worry Detective” helps children learn to deal with fear.

“Her name was inspired by helping children deal with big, complicated feelings that are difficult to understand or identify and by teaching children language so they can identify these big feelings,” Olsen told “Good Morning America.”

Olsen, who said she had “weird panic attacks” in her early 20s, said her own mental health journey inspired “Hattie Harmony.”

“I think a lot of the tools Robbie and I instinctively wrote about were tools we had to use ourselves,” said Olsen, adding that conscious movement and breathing were important tools she learned to help ease her anxiety.

“We hope the book becomes a welcome reminder for children that it’s okay to have complicated, big feelings, and that this book can give them tools to maybe deal with them instead of ignoring them,” she continued.

Although “Hattie Harmony” is Olsen’s first book, she and Arnett both have plenty of other favorite children’s books and shared some of the books that inspired them as kids.

Shop “Hattie Harmony: Worry Detective” and Olsen and Arnett’s recommendations below.

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‘Hattie Harmony: Worry Detective’ by Elizabeth Olsen and Robbie Arnett

Margaret Wise Brown’s Goodnight Moon

“Many people of our age and many generations have read [‘Goodnight Moon’] at night,” Olsen said. “We love a classic and want to represent a classic on our list.”

Where the Sidewalk Ends by Shel Silverstein

“My siblings and I would argue about that copy,” Olsen said. “We ended up having several because we all loved them so much.”

‘Where the Wild Things Are’ and ‘In the Night Kitchen’ by Maurice Sendak

“‘In The Night Kitchen’ is a wild, wacky book with beautiful art,” Arnett said.

‘What is Love’ by Mac Barnett

“Mac Barnett is a new author that we love. ‘What Is Love’ is one of his new books,” Arnett said.

“There’s always humor in his writing,” Olsen added.

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