Kaley Cuoco – Thad Luckinbill : Dated (2002)
There seems to be a time in the past when it was somehow cool for you to have the same color hair as your significant other. It seems Kaley Cuoco and Thad Luckinbill probably caught on with the trend. They dated for less than a year in the early 2000s. At the time, Thad was well known for playing the character J.T. on the TV soap opera The Young and The Restless. He was one of the long-standing cast members, having played J.T. from the year 1999 to the year 2010. Thad still acts but his appearances are not as regular as before. He recently landed a part in the movie Only The Brave.
DJ Qualls – Nikki Reed : Dated (2006 to 2007)
CalTech research assistant Toby Loobenfeld on The Big Bang Theory is played by geeky DJ Qualls. The actor makes appearances on the show whenever Sheldon needs Toby to play Sheldon’s fake cousin. DJ Qualls is more popularly known for playing Kyle in the Road Trip movies. He dated actress Nikki Reed, also known as Twilight’s Rosalie Hale, for a little more than a year. Their relationship didn’t really last, and Nikki has gone on to marry two times since she was together with DJ.