Katherine Heigl

Becoming a respected actress didn't do it nor did winning an Emmy or buying her own house.

No, the thing that made Katherine Heigl feel like a true adult was getting married to Josh Kelley becoming a mother.

The 'Knocked Up' star told People: "With two children and a husband of almost seven years. I feel like I'm finally a legitimate grown-up ... I have a deeper understanding about what really matters and whose opinion really matters."

The couple are parents to two adopted daughters and a son.