John Krasinski [1] is one proud dad. The actor made a heartwarming appearance on Jimmy Kimmel Live! on Monday, where he opened up about how his 2-year-old daughter, Hazel [2], is adjusting to being a big sister to his and Emily Blunt's newborn [3] daughter, Violet, whom they welcomed earlier this Summer. Spoiler: she loves it. "She's just young enough to know that, 'That's adorable and I get a lot of attention when I do things like hug her, because it looks like a Hallmark card,'" he explained. "'But as long as she doesn't mess with my stuff, we're good.' That's kind of the relationship they have right now." He also gushed about how lucky he feels to be their dad. "I truly — every single night — say, 'I can't believe these two amazing girls are mine.'" Too cute!