The Vampire Diaries hottie posted a photo of Dobrev's September Cosmopolitan cover issue on his Instagram Monday, calling it "stunning" while he was at it.
"In a store this morning-who do I see?The one&only @ninadobrev These things are almost gone so If you haven't gotten this magazine off of a shelf-get one," Ian wrote. "One word: Stunning... Congrats Nina! Xo Ian."
Nina soon replied to his sweet post, tweeting, "Thank you Smouldy," with a retweet of his Instagram post.
While there's no word on if the co-stars' exchange is an indication of a possible reconciliation, at least they're keeping their on-and-off set relationship cordial.
Ian and Nina called it quits in May after dating for over three years, with both keeping mum on the reason behind their break-up.
Following their split, Nina told Us Weekly in August she's not in a rush to get into another relationship, saying, "I've been a relationship girl and I've been in long-term relationships my whole life until this point, so I think I'm looking forward to spending some time with myself and finding myself again."
"I'm just discovering different sides of me and growing and then I'll figure out what I like in a man when I see it."
The actress went on to say she and Ian have no hard feelings towards each other post-break-up, adding, "It's all about finding out what meshes and what doesn't, and what you like and what you don't."
"Life is about experiences, so I guess I'm just figuring that out."
Want More? Like us on Facebook
Gallery | Awkward Sets: Ex-Couples Who Work Together