"Happy Bday Smouldy! Hope you had a beautiful day filled w/ smiles+gluten free cake!But not too much cake,we're on the CW :P
The Vampire Diaries star turned the big 3-5 Sunday, and although he didn't address Nina specifically on Twitter, he made sure to let everyone know how much he appreciated all of the birthday shout outs.
"Thank you EVERYONE for all of these Birthday wishes-it's really special," he tweeted Sunday. "Dear Mom, Thanks for pushing me out into this beautiful,magical&insane world to be challenged,loved and ALIVE..."
The hunky thesp also thanked fans for the "birthday love," and asked them to donate to his Ian Somerhalder Foundation.
"I cant thank you enough today formy birthday love.Pls RETWEET!Donate!Help us change the world http://isfoundation.org ," he went on.
Ian previously told fans that his one wish for his birthday was for each of them to donate $35 each to the organization in honor of his big day. He reiterated that Saturday, posting a shot of himself holding one of his pups on Instagram, along with a caption that said, "Please help us by being THE 1,000,000 out of the 7,00,000,000 on the planet to help create the change we know we need and protect a ton of these little ones!"
Happy Birthday Ian!