Happy Birthday, Hilary Duff!

Quarter-life crisis, what? Not for Hilary Duff, who turned the ripe ol' age of 25 today. Happy birthday, Hilary! The singer/actress took to Twitter today to thank her fans for all of the well-wishes that made her feel oh-so loved on her special day.

The last year has certainly been a big one for the actress. In October, she released her second novel, "Devoted," a sequel to the best-selling "Elixir." Then, in March, she gave birth to her first child, son Luca Cruz Comrie, with hockey-player husband Mike Comrie. And just last night, the new mom appeared on an episode of "Project Runway" to judge the contestants' baby outfit designs. (Busy mama!)

So what will 25 hold for Hilary? We can't wait to find out!

Leave your birthday wishes for Hilary in the comments!