And now there are photos to prove it.
An Associated Press photographer captured a series of shots of a would-be First Family in training. They show Cruz, the Texas Republican, during a walk-through at Virginia's Liberty University, a Christian college in Lynchburg, Virginia, where he will make his White House bid official Monday morning.
In some of the photos, Cruz walks hand-in-hand with his wife, Heidi, and the couple's two daughters -- apparently practicing everything from their wave to a kiss.
Cruz, 44, is the first major candidate to enter what is expected to be a crowded Republican primary field, and his announcement tomorrow will officially kick of the 2016 presidential race.
ABC's Arlette Saenz contributed reporting.