The 'True Blood' star celebrated his birthday yesterday and the 42-year-old actress marked the occasion with a picture of the couple embracing, alongside a message for him.
"Happy happy birthday to my love and best friend... To the one that makes me laugh like crazy (sic)! Have a healthy wonderful (sic) year babe!!!" the note read.
Vergara and Manganiello began dating in July, this year after she broke off her engagement to longtime partner Nick Loeb.