2. He grew up with Mark Ballas. Derek and his sister, former DWTS pro Julianne Hough, were sent to London as kids to study dance with Corky and Shirley Ballas — aka, Mark's parents. Derek lived in London for 10 years, and Derek, Mark, and Julianne grew up as best friends. They even had their own pop group as teens, 2B1G ("2 Boys 1 Girl"). See them perform here.
3. He wants to go into acting. Derek has already starred in the filmCobu 3D, and has hinted he might leave DWTS to further pursue an acting career.
4. He has four sisters. DWTS fans know Julianne, but he also has sisters Katherine, Mara Beth, and Sharee. He already has 15 nieces and nephews!
5. He's won the Mirror Ball 3 times (prior to the All-Stars Season). He was the first pro to win three. He has also made it to the finals two additional times (including All-Stars), and the semi-finals three times on top of that.
Dancing With the Stars airs Mondays and Tuesdays onABC.
Source:IMDB Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter@BeccaMartin47.