The 31-year-old "Office" star, who took to the event in a sleek gray suit, recently opened up to Ellen DeGeneres about his real-life made for the big screen romance with wife Emily Blunt.
John says it really was love at first sight for the married couple, revealing, "It was one of those things where I wasn't really looking for a relationship and I was thinking I'm going to take my time in L.A.," adding "Then I met her and I was so nervous. I was like, 'Oh god, I think I'm going to fall in love with her.' As I shook her hand I went, 'I like you.' "
Krasinski also joked about his push to pop the question, telling, "I was like, I'm going to propose to her real fast before she wakes and was like, 'What am I doing? I can have anybody.' I was like, just put [on] this the ring. Shhh..."