According to Duff, the proposal took her completely by surprise. "I came home from work on a random Tuesday. And he's like, 'Let's go for walk, let's go check out this park,'" Duff recalled. "And we were living in Williamsburg, and I was like, 'I'm so tired.' We just started Game of Thrones and I'm like, 'I want to eat dinner in bed and watch Game of Thrones. And he's like, 'No, no. Let's go on a walk.' And I'm like, 'Ugh. If I put my sweatpants on I'll go.' And he's like, 'OK.'"
When the reached the park, Koma presented Duff with a storybook. "And he's like, 'It's our story,'" she said. "And he had this amazing guy, Shane, do all these illustrations. And he was like, '...We're going to forget things along the way, so we need to constantly fill this out, so our kids can know our story.'" Once she reached the end of the book, she found a ring hidden in a secret compartment. "It was so sweet. It was so sweet," she said. "And he got down on one knee and he's like, 'I forgot everything I'm supposed to say, but you're my best friend.' It was so sweet." As we now know, the elated actress happily accepted.
As for the first person she called after the proposal? It may surprise you. Rather than sharing the good news with a family member, Duff reached out to her Younger co-star, Molly Bernard, according to People. Although the engagement shocked many fans, it's safe to say that it shocked Duff the most. In January, the actress told Entertainment Tonight that the two weren't rushing into anything. "I'm really happy, he's amazing, and I mean, honestly, we don't really want to leave the house that much these days," she admitted. "We just stare at our baby and we're like, 'Look what we made. We did this.' And he's such an amazing dad and so supportive and I just feel very happy."