Let's make this birthday one to remember.

45 years old (Born on April 17, 1980)

Happy Birthday, Alaina Huffman! From kicking butt as Painkiller Jane to exploring galaxies in Stargate Universe and bringing fierce charm into Smallville—your talent has truly made sci-fi fans everywhere believe superheroes are real. Your ability to portray strong characters with wit and grace is unmatched.

May your birthday be filled with laughter brighter than a Kryptonian sunrise, adventures more thrilling than interstellar travel aboard Destiny, and celebrations grander than any comic-con panel you've conquered. Here's hoping this year brings you even greater roles—and perhaps fewer alien invasions!

Cheers to another fantastic orbit around the sun—you superheroine extraordinaire!