Happy Birthday, Bella Thorne! See the 18-Year-Old's Best Looks, Plus Read the Love Note From Her Boyfriend Gregg Sulkin

See all of the birthday girl's best red carpet moments

Considering she's already a certified red carpet pro, it's hard to believe that Bella Thorne is only turning 18. And truthfully, there's no better way to ring in her big day than by throwing it back to her biggest style hits yet.

Rewind to the Horrible Bosses 2 premiere, when Bella turned heads in a pearly white Gucci jumpsuit. Then opting for a more glamorous effect, the teen star slipped into a mint green pleated silk bustier Maria Lucia Hohan dress for the 2015 MTV Video Music Awards.

Now Bella's never been afraid to show a  little skin, as is evidenced by her sexy, leg-baring orange Balmain mini the 2015 Teen Choice Awards or her plunging tow-tone Naeem Khan jumpsuit at the Pitch Perfect 2 premiere. But really, it's that striking backless black gown from a Paper magazine bash that impresses us most.

Oh, and don't think the we're the only ones helping Bella celebrate her bday—nope, her beau Gregg Sulkin already kicked things off with an awe-worthy love note to his girlfriend.

Happy 18th Birthday to my beautiful and incredible princess. You are such a wonderful, Kind, generous, loving person and you are insanely important to me. Thank you for being that special person in my life that I always wish I could have and for being the best girlfriend on the planet. You have never failed to make me smile or laugh and I hope this year brings you everything you wish for. I'm sure I've told you in the past, that personality is everything. However, on top of your charisma and captivating energy, you're also very very very very good looking. As my dad would say; "boy, you done good". I love you. Lots. #18thBirthday #Iloveyou #mybubba

A photo posted by Gregg Sulkin (@greggsulkin) on Oct 7, 2015 at 11:27pm PDT

To see all of the birthday girl's best looks, check out the gallery below!