Magic Mike actor Stephen 'tWitch' Boss and his dancer wife Allison Holker are expecting their first child together. Holker is currently serving as singer/songwriter Andy Grammer's pro partner on U.S. competition series Dancing With The Stars, and she made the announcement on Monday's (05Oct15) live episode. Boss and Holker, who met on another competition series So You Think You Can Dance, wed in 2013. Holker has a seven-year-old daughter from a previous relationship.