On this day 25 years ago, a star was born. Those of you who are mega fans of The Vampire Diaries know that Nina Dobrev (Elena Gilbert) is celebrating a big day today with her 25th birthday — and she isn’t celebrating alone!

Luckily Nina has costars and besties to spend the day with, and one of those people in attendance might surprise you. Not only is Nina hanging out with Julianne Hough, but ex-boyfriend Ian Somerhalder (Damon Salvatore) is there too! After their big night at the 2014 People’s Choice Awards, Ian took to Twitter to wish Nina the happiest of birthdays.

“Happy Birthday @ninadobrev!!! The world loves you! We all do ;) Enjoy the moment, enjoy the day, enjoy the year!” Ian tweeted at his co-star. That’s basically the sweetest birthday message we’ve ever heard.

At last night’s big event, Nina and Ian took the stage to accept the award for Favorite On-Screen Chemistry. Even though these former lovers broke up last year, they haven’t let that get in the way of their Delena romance or their acceptance speech.

The pair made fun of their on-screen romance as well as their off-screen breakup. “At least we have chemistry,” the two joked, right before Ian leaned over and planted a kiss on Nina’s cheek. So precious!

We’re so glad these two have maintained a good relationship post-breakup — we’re just as obsessed with their adorable friendship. Happy Birthday, Nina!

Are you surprised that Nina is spending her birthday with Ian? Hit the comments and let us know!

The Vampire Diaries airs Thursday nights at 8 p.m. ET on The CW.

Carson Blackwelder is an Associate Editor at Wetpaint Entertainment. Follow him on Twitter and Google+!