Chmerkovskiy will make his return to the ballroom floor on Monday
with dancing partner, Heather Morris. The dancing pro's calf injury, which he sustained during rehearsals, has kept him sidelined since late March. In his place, troupe dancer Alan Bersten has been dancing alongside Morris.
ET caught up with Bersten on Monday, who opened up about Chmerkovskiy stepping back out onto the floor.
"It's not easy for anyone to switch partners, especaily a celebrity, who's new to all this," he said, commending Morris on her adjustment. "She had to switch after the first week which is incredibly hard -- she had gotten to know Maks for three weeks [two before the show started.] It's not easy for Heather in particular because me and maks are not the same ... Maks is very straightforward, i'm more of a goofball."