The picture book — which is intended to educate children on how to cope with anxiety — is a sequel to their New York Times bestseller titled Hattie Harmony: Worry Detective.

The Avengers: Endgame alum, who cautioned future Marvel stars against signing multi-movie deals, and the musician previously released the prequel around this time last year.

Casual display: Elizabeth Olsen was spotted heading out from her book signing at Barnes & Noble Union Square in New York City on Saturday. The 34-year-old Love & Death actress put on a casual display in a black crochet vest and baggy trousers for the event celebrating her new book titled Hattie Harmony: Opening Night

For the book reading and signing event with her husband, Olsen wore the sleeveless, cropped vest over a classic white T-shirt.

The SoCal native looked comfortable in a pair of loose-fitting pants and leather sandals.

She was spotted leaving the event in blackout wayfarer sunglasses and toting around a white leather crossbody bag with a bamboo handle and striped fabric strap.

The younger sister of Full House stars Mary-Kate and Ashley Olsen opted for a minimal makeup look to showcase her natural beauty.

She looked radiant in a light glam featuring a rosy pink blush and nude glossy lip.

She left her collarbone-length blonde tresses down in a straight hairstyle that was parted to the side.

According to the summary of their Olsen and her husband’s collaborative new book, Hattie Harmony: Opening Night follows the main protagonist as she shares new tools for managing anxiety as she prepares for the opening night of a school play.

Previously, the couple reportedly started dating after meeting while vacationing in Mexico in early 2017.

Effortlessly stylish: For the book reading and signing event with her husband, Olsen wore the sleeveless, cropped vest over a classic white T-shirt. The SoCal native looked comfortable in a pair of loose-fitting pants and leather sandals. She was spotted leaving the event in blackout wayfarer sunglasses and toting around a white leather crossbody bag with a bamboo handle and striped fabric strap

Natural beauty: The younger sister of Full House stars Mary-Kate and Ashley Olsen opted for a minimal makeup look to showcase her natural beauty. She left her collarbone-length blonde tresses down in a straight hairstyle that was parted to the side

Cute couple: Previously, the couple reportedly started dating after meeting while vacationing in Mexico in early 2017. Two years later in July 2019, the pair got engaged and tied the knot shortly after

Later that year in September, the pair debuted their relationship by making their first red carpet appearance together at a pre-Emmy party in Los Angeles.

Over the years, however, they have remained relatively tight-lipped about their romance.

Two years later in July 2019, the pair got engaged and secretly tied the knot shortly after. About a year after their nuptials, Olsen confirmed that they had eloped pre-pandemic.

During an interview with Sirius XM’s The Jess Cagle Show in June 2022, Olsen and her partner opened up about their private wedding while promoting their first book.

‘We eloped and then we had a wedding at another time and it was before COVID,’ she revealed at the time. ‘I just never talked about it.’