Let's make this birthday one to remember.

40 years old (Born on March 26, 1984)

Happy Birthday to the ever-charming Sara Jean Underwood! From dazzling us as Playboy's Playmate of July 2006, to capturing hearts worldwide as Playmate of the Year in 2007, you've proven that beauty and charisma only get better with time. Your playful spirit and adventurous soul continue inspiring fans everywhere—seriously, how do you manage to make hiking boots look runway-ready?

Here's wishing you another year filled with laughter, adventure—and plenty more Instagram-worthy moments. May your birthday be brighter than a photoshoot spotlight and sweeter than all those throwback memories combined. Keep shining bright; you're timelessly fabulous!