The reveal was announced on Good Morning America Wednesday after Chmerkovskiy, 32, teased the news on Instagram the night before.
“He is awesome,” gushed McKeon. “He’s the most amazing partner, most patience than anybody I know and I’m so lucky.”
— Good Morning America (@GMA) September 5, 2018
Best known for her role as Jo Polniaczek on the 1980 NBC sitcom The Facts of Life, McKeon, 52, also acted in the TV series Sonny with a Chance, Without a Trace, Touched by an Angel, and the TV movie Wild Hearts.
While McKeon and Chmerkovskiy will certainly bring the heat this season, the competition for the Brooklyn native will be especially fierce considering he will be battling it out against his fiancée, Jenna Johnson.
For season 27, Cheryl Burke, Sharna Burgess, Emma Slater, Lindsay Arnold, Witney Carson, Sasha Farber, Gleb Savchenko, Artem Chigvintsev, Keo Motsepe, Alan Bersten and Brandon Armstrong will also be joining Chmerkovskiy and Johnson as pros.
“It’s good. Wedding planning is good, it’s happening,” Chmerkovskiy previously told PEOPLE. “It’s organic, it’s stress-free.”
Season 27 of Dancing with the Stars premieres Sept. 24 at 8 p.m. ET on ABC.