star met Derek through professional dancer Julianne Hough, and fell for her close friend's older brother after "hanging out" with the siblings.
While Nina and Derek have previously kept quiet about their romance, it seems the lovebirds are ready to go public with their relationship.
The two have been photographed hand-in-hand over the summer, but neither of them have officially confirmed a romance together.
But after eight years together he reportedly broke up with her to start dating his DWTS season six partner Shannon Elizabeth.The couple shares Shannon’s passionate beliefs in environmental protection and veganism.She also advocates for pet adoption and reducing pet overpopulation.The 24-year-old actress posted a photo of Derek holding his Emmy award earlier this week, and affectionately wrote, "@Derekhough !!!!!!!!#EMMYWINNER I can't express in 140 characters how unbelievably excited incredibly proud I am of…" CLICK ON PHOTO FOR GALLERY Nina clearly had Derek on her mind as she uploaded another snapshot later that day, with the caption,"@derekhough Those of us touched by your light got to watch you brighten up the rest of the world. …" The professional responded to Nina's tweet, writing, "[You're] the best babe." The couple reportedly started dating in August, but are already quite serious about each other. "He said he hasn't felt this way for a girl in a long time.