Let's make this birthday one to remember.

46 years old (Born on January 13, 1979)

Happy Birthday, Dennis Siver! May your day spin faster than that legendary spinning back kick at UFC 93—still one of the coolest knockouts we've ever seen. Since your debut on April 21, 2007 at UFC 70, you've been kicking expectations (and opponents) out of the octagon with style.

Here's hoping this year brings you as much excitement and applause as when you earned Knockout of the Night honors. Keep those kicks sharp and celebrations sharper; after all, age is just a number—but epic spinning kicks are forever timeless. Cheers to another roundhouse trip around the sun!